1 code implementation • Findings (EMNLP) 2021 • Rocco Tripodi, Simone Conia, Roberto Navigli
Multilingual and cross-lingual Semantic Role Labeling (SRL) have recently garnered increasing attention as multilingual text representation techniques have become more effective and widely available.
1 code implementation • EMNLP 2020 • Rexhina Blloshmi, Rocco Tripodi, Roberto Navigli
Abstract Meaning Representation (AMR) is a popular formalism of natural language that represents the meaning of a sentence as a semantic graph.
no code implementations • EMNLP 2020 • Bianca Scarlini, Tommaso Pasini, Roberto Navigli
Contextualized word embeddings have been employed effectively across several tasks in Natural Language Processing, as they have proved to carry useful semantic information.
Ranked #11 on
Word Sense Disambiguation
on Supervised:
no code implementations • EMNLP 2020 • Michele Bevilacqua, Marco Maru, Roberto Navigli
Mainstream computational lexical semantics embraces the assumption that word senses can be represented as discrete items of a predefined inventory.
no code implementations • LREC 2022 • Riccardo Orlando, Simone Conia, Stefano Faralli, Roberto Navigli
In this paper, we present the Universal Semantic Annotator (USeA), which offers the first unified API for high-quality automatic annotations of texts in 100 languages through state-of-the-art systems for Word Sense Disambiguation, Semantic Role Labeling and Semantic Parsing.
no code implementations • NAACL 2022 • Niccolò Campolungo, Tommaso Pasini, Denis Emelin, Roberto Navigli
Recent studies have shed some light on a common pitfall of Neural Machine Translation (NMT) models, stemming from their struggle to disambiguate polysemous words without lapsing into their most frequently occurring senses in the training corpus. In this paper, we first provide a novel approach for automatically creating high-precision sense-annotated parallel corpora, and then put forward a specifically tailored fine-tuning strategy for exploiting these sense annotations during training without introducing any additional requirement at inference time. The use of explicit senses proved to be beneficial to reduce the disambiguation bias of a baseline NMT model, while, at the same time, leading our system to attain higher BLEU scores than its vanilla counterpart in 3 language pairs.
1 code implementation • Findings (NAACL) 2022 • Simone Tedeschi, Federico Martelli, Roberto Navigli
Idioms are phrases which present a figurative meaning that cannot be (completely) derived by looking at the meaning of their individual components. Identifying and understanding idioms in context is a crucial goal and a key challenge in a wide range of Natural Language Understanding tasks.
1 code implementation • Findings (NAACL) 2022 • Simone Tedeschi, Roberto Navigli
Named Entity Recognition (NER) is the task of identifying named entities in texts and classifying them through specific semantic categories, a process which is crucial for a wide range of NLP applications.
no code implementations • SemEval (NAACL) 2022 • Jingxuan Tu, Eben Holderness, Marco Maru, Simone Conia, Kyeongmin Rim, Kelley Lynch, Richard Brutti, Roberto Navigli, James Pustejovsky
In this task, we identify a challenge that is reflective of linguistic and cognitive competencies that humans have when speaking and reasoning.
1 code implementation • SemEval (NAACL) 2022 • Simone Tedeschi, Roberto Navigli
Idioms are lexically-complex phrases whose meaning cannot be derived by compositionally interpreting their components.
no code implementations • COLING (MWE) 2020 • Roberto Navigli
In this talk I present Generationary, an approach that goes beyond the mainstream assumption that word senses can be represented as discrete items of a predefined inventory, and put forward a unified model which produces contextualized definitions for arbitrary lexical items, from words to phrases and even sentences.
1 code implementation • ACL 2022 • Marco Maru, Simone Conia, Michele Bevilacqua, Roberto Navigli
With state-of-the-art systems having finally attained estimated human performance, Word Sense Disambiguation (WSD) has now joined the array of Natural Language Processing tasks that have seemingly been solved, thanks to the vast amounts of knowledge encoded into Transformer-based pre-trained language models.
1 code implementation • ACL 2022 • Simone Conia, Roberto Navigli
Thanks to the effectiveness and wide availability of modern pretrained language models (PLMs), recently proposed approaches have achieved remarkable results in dependency- and span-based, multilingual and cross-lingual Semantic Role Labeling (SRL).
1 code implementation • ACL 2022 • Cesare Campagnano, Simone Conia, Roberto Navigli
In the field of sentiment analysis, several studies have highlighted that a single sentence may express multiple, sometimes contrasting, sentiments and emotions, each with its own experiencer, target and/or cause.
no code implementations • ACL 2022 • Niccolò Campolungo, Federico Martelli, Francesco Saina, Roberto Navigli
Lexical ambiguity poses one of the greatest challenges in the field of Machine Translation.
1 code implementation • ACL 2022 • Edoardo Barba, Luigi Procopio, Roberto Navigli
Local models for Entity Disambiguation (ED) have today become extremely powerful, in most part thanks to the advent of large pre-trained language models.
1 code implementation • ACL 2022 • Abelardo Martinez Lorenzo, Marco Maru, Roberto Navigli
A language-independent representation of meaning is one of the most coveted dreams in Natural Language Understanding.
no code implementations • EMNLP (ACL) 2021 • Simone Conia, Riccardo Orlando, Fabrizio Brignone, Francesco Cecconi, Roberto Navigli
Notwithstanding the growing interest in cross-lingual techniques for Natural Language Processing, there has been a surprisingly small number of efforts aimed at the development of easy-to-use tools for cross-lingual Semantic Role Labeling.
no code implementations • EMNLP (ACL) 2021 • Riccardo Orlando, Simone Conia, Fabrizio Brignone, Francesco Cecconi, Roberto Navigli
Over the past few years, Word Sense Disambiguation (WSD) has received renewed interest: recently proposed systems have shown the remarkable effectiveness of deep learning techniques in this task, especially when aided by modern pretrained language models.
no code implementations • EMNLP (ACL) 2021 • Rexhina Blloshmi, Michele Bevilacqua, Edoardo Fabiano, Valentina Caruso, Roberto Navigli
In this paper we present SPRING Online Services, a Web interface and RESTful APIs for our state-of-the-art AMR parsing and generation system, SPRING (Symmetric PaRsIng aNd Generation).
1 code implementation • EMNLP 2021 • Caterina Lacerra, Rocco Tripodi, Roberto Navigli
The lexical substitution task aims at generating a list of suitable replacements for a target word in context, ideally keeping the meaning of the modified text unchanged.
1 code implementation • EMNLP 2021 • Ahmed El Sheikh, Michele Bevilacqua, Roberto Navigli
Neural Word Sense Disambiguation (WSD) has recently been shown to benefit from the incorporation of pre-existing knowledge, such as that coming from the WordNet graph.
1 code implementation • EMNLP 2021 • Edoardo Barba, Luigi Procopio, Roberto Navigli
Supervised systems have nowadays become the standard recipe for Word Sense Disambiguation (WSD), with Transformer-based language models as their primary ingredient.
Ranked #1 on
Word Sense Disambiguation
on Supervised:
1 code implementation • EMNLP 2021 • Rexhina Blloshmi, Tommaso Pasini, Niccolò Campolungo, Somnath Banerjee, Roberto Navigli, Gabriella Pasi
With the advent of contextualized embeddings, attention towards neural ranking approaches for Information Retrieval increased considerably.
1 code implementation • Findings (EMNLP) 2021 • Simone Tedeschi, Simone Conia, Francesco Cecconi, Roberto Navigli
Entity Linking (EL) systems have achieved impressive results on standard benchmarks mainly thanks to the contextualized representations provided by recent pretrained language models.
Ranked #4 on
Entity Disambiguation
on ACE2004
1 code implementation • Findings (EMNLP) 2021 • Simone Tedeschi, Valentino Maiorca, Niccolò Campolungo, Francesco Cecconi, Roberto Navigli
Multilingual Named Entity Recognition (NER) is a key intermediate task which is needed in many areas of NLP.
1 code implementation • 2 Dec 2022 • Simone Conia, Edoardo Barba, Alessandro Scirè, Roberto Navigli
One of the common traits of past and present approaches for Semantic Role Labeling (SRL) is that they rely upon discrete labels drawn from a predefined linguistic inventory to classify predicate senses and their arguments.
1 code implementation • 23 Oct 2022 • Sedrick Scott Keh, Rohit K. Bharadwaj, Emmy Liu, Simone Tedeschi, Varun Gangal, Roberto Navigli
We introduce EUREKA, an ensemble-based approach for performing automatic euphemism detection.
no code implementations • 12 Oct 2022 • Vera Provatorova, Simone Tedeschi, Svitlana Vakulenko, Roberto Navigli, Evangelos Kanoulas
Entity disambiguation (ED) is the task of mapping an ambiguous entity mention to the corresponding entry in a structured knowledge base.
1 code implementation • 11 Oct 2022 • Luigi Procopio, Simone Conia, Edoardo Barba, Roberto Navigli
Local models have recently attained astounding performances in Entity Disambiguation (ED), with generative and extractive formulations being the most promising research directions.
no code implementations • 15 Jun 2022 • Pere-Lluís Huguet Cabot, Abelardo Carlos Martínez Lorenzo, Roberto Navigli
With the surge of Transformer models, many have investigated how attention acts on the learned representations.
1 code implementation • Findings (EMNLP) 2021 • Pere-Lluis Huguet Cabot, Roberto Navigli
Extracting relation triplets from raw text is a crucial task in Information Extraction, enabling multiple applications such as populating or validating knowledge bases, factchecking, and other downstream tasks.
Ranked #1 on
Joint Entity and Relation Extraction
on DocRED
(using extra training data)
1 code implementation • SEMEVAL 2021 • Federico Martelli, Najla Kalach, Gabriele Tola, Roberto Navigli
We illustrate our task, as well as the construction of our manually-created dataset including five languages, namely Arabic, Chinese, English, French and Russian, and the results of the participating systems.
1 code implementation • ACM Web Science 2021 • Agostina Calabrese, Michele Bevilacqua, Björn Ross, Rocco Tripodi, Roberto Navigli
In this work, we introduce Adversarial Attacks against Abuse (AAA), a new evaluation strategy and associated metric that better captures a model’s performance on certain classes of hard-to-classify microposts, and for example penalises systems which are biased on low-level lexical features.
Ranked #1 on
Hate Speech Detection
on Waseem et al., 2018
1 code implementation • NAACL 2021 • Simone Conia, Andrea Bacciu, Roberto Navigli
While cross-lingual techniques are finding increasing success in a wide range of Natural Language Processing tasks, their application to Semantic Role Labeling (SRL) has been strongly limited by the fact that each language adopts its own linguistic formalism, from PropBank for English to AnCora for Spanish and PDT-Vallex for Czech, inter alia.
1 code implementation • NAACL 2021 • Edoardo Barba, Tommaso Pasini, Roberto Navigli
By means of an extensive array of experiments, we show that ESC unleashes the full potential of our model, leading it to outdo all of its competitors and to set a new state of the art on the English WSD task.
Ranked #4 on
Word Sense Disambiguation
on Supervised:
no code implementations • NAACL 2021 • Luigi Procopio, Rocco Tripodi, Roberto Navigli
Graph-based semantic parsing aims to represent textual meaning through directed graphs.
1 code implementation • Proceedings of the AAAI Conference on Artificial Intelligence 2021 • Michele Bevilacqua, Rexhina Blloshmi, Roberto Navigli
In Text-to-AMR parsing, current state-of-the-art semantic parsers use cumbersome pipelines integrating several different modules or components, and exploit graph recategorization, i. e., a set of content-specific heuristics that are developed on the basis of the training set.
Ranked #1 on
AMR-to-Text Generation
on The Little Prince
(BLEURT metric)
1 code implementation • EACL 2021 • Simone Conia, Roberto Navigli
Recent studies treat Word Sense Disambiguation (WSD) as a single-label classification problem in which one is asked to choose only the best-fitting sense for a target word, given its context.
1 code implementation • COLING 2020 • Simone Conia, Roberto Navigli
Recent research indicates that taking advantage of complex syntactic features leads to favorable results in Semantic Role Labeling.
1 code implementation • COLING 2020 • Simone Conia, Roberto Navigli
To date, the most successful word, word sense, and concept modelling techniques have used large corpora and knowledge resources to produce dense vector representations that capture semantic similarities in a relatively low-dimensional space.
no code implementations • EMNLP 2020 • Simone Conia, Fabrizio Brignone, Davide Zanfardino, Roberto Navigli
Semantic Role Labeling (SRL) is deeply dependent on complex linguistic resources and sophisticated neural models, which makes the task difficult to approach for non-experts.
1 code implementation • ACL 2020 • Michele Bevilacqua, Roberto Navigli
Neural architectures are the current state of the art in Word Sense Disambiguation (WSD).
Ranked #6 on
Word Sense Disambiguation
on Supervised:
no code implementations • ACL 2020 • Federico Scozzafava, Marco Maru, Fabrizio Brignone, Giovanni Torrisi, Roberto Navigli
Exploiting syntagmatic information is an encouraging research focus to be pursued in an effort to close the gap between knowledge-based and supervised Word Sense Disambiguation (WSD) performance.
no code implementations • ACL 2020 • Agostina Calabrese, Michele Bevilacqua, Roberto Navigli
Thanks to the wealth of high-quality annotated images available in popular repositories such as ImageNet, multimodal language-vision research is in full bloom.
no code implementations • LREC 2020 • Valentina Leone, Giovanni Siragusa, Luigi di Caro, Roberto Navigli
Word senses are typically defined with textual definitions for human consumption and, in computational lexicons, put in context via lexical-semantic relations such as synonymy, antonymy, hypernymy, etc.
no code implementations • LREC 2020 • Bianca Scarlini, Tommaso Pasini, Roberto Navigli
This limits the range of action of deep-learning approaches, which today are at the base of any NLP task and are hungry for data.
2 code implementations • 4 Mar 2020 • Aidan Hogan, Eva Blomqvist, Michael Cochez, Claudia d'Amato, Gerard de Melo, Claudio Gutierrez, José Emilio Labra Gayo, Sabrina Kirrane, Sebastian Neumaier, Axel Polleres, Roberto Navigli, Axel-Cyrille Ngonga Ngomo, Sabbir M. Rashid, Anisa Rula, Lukas Schmelzeisen, Juan Sequeda, Steffen Staab, Antoine Zimmermann
In this paper we provide a comprehensive introduction to knowledge graphs, which have recently garnered significant attention from both industry and academia in scenarios that require exploiting diverse, dynamic, large-scale collections of data.
no code implementations • IJCNLP 2019 • Rocco Tripodi, Roberto Navigli
They represent ambiguous words as the players of a non cooperative game and their senses as the strategies that the players can select in order to play the games.
no code implementations • IJCNLP 2019 • Andrea Di Fabio, Simone Conia, Roberto Navigli
We present VerbAtlas, a new, hand-crafted lexical-semantic resource whose goal is to bring together all verbal synsets from WordNet into semantically-coherent frames.
no code implementations • IJCNLP 2019 • Marco Maru, Federico Scozzafava, Federico Martelli, Roberto Navigli
Current research in knowledge-based Word Sense Disambiguation (WSD) indicates that performances depend heavily on the Lexical Knowledge Base (LKB) employed.
no code implementations • RANLP 2019 • Michele Bevilacqua, Roberto Navigli
While contextualized embeddings have produced performance breakthroughs in many Natural Language Processing (NLP) tasks, Word Sense Disambiguation (WSD) has not benefited from them yet.
no code implementations • ACL 2019 • Ignacio Iacobacci, Roberto Navigli
While word embeddings are now a de facto standard representation of words in most NLP tasks, recently the attention has been shifting towards vector representations which capture the different meanings, i. e., senses, of words.
no code implementations • ACL 2019 • Bianca Scarlini, Tommaso Pasini, Roberto Navigli
The well-known problem of knowledge acquisition is one of the biggest issues in Word Sense Disambiguation (WSD), where annotated data are still scarce in English and almost absent in other languages.
no code implementations • SEMEVAL 2018 • Jose Camacho-Collados, Claudio Delli Bovi, Luis Espinosa-Anke, Sergio Oramas, Tommaso Pasini, Enrico Santus, Vered Shwartz, Roberto Navigli, Horacio Saggion
This paper describes the SemEval 2018 Shared Task on Hypernym Discovery.
no code implementations • 12 May 2018 • Tommaso Pasini, Francesco Maria Elia, Roberto Navigli
We release to the community six large-scale sense-annotated datasets in multiple language to pave the way for supervised multilingual Word Sense Disambiguation.
1 code implementation • ACL 2017 • Mohammad Taher Pilehvar, Jose Camacho-Collados, Roberto Navigli, Nigel Collier
Lexical ambiguity can impede NLP systems from accurate understanding of semantics.
no code implementations • EMNLP 2017 • Tommaso Pasini, Roberto Navigli
Annotating large numbers of sentences with senses is the heaviest requirement of current Word Sense Disambiguation.
no code implementations • EMNLP 2017 • Aless Raganato, ro, Claudio Delli Bovi, Roberto Navigli
Word Sense Disambiguation models exist in many flavors.
Ranked #19 on
Word Sense Disambiguation
on Supervised:
no code implementations • SEMEVAL 2017 • Jose Camacho-Collados, Mohammad Taher Pilehvar, Nigel Collier, Roberto Navigli
This paper introduces a new task on Multilingual and Cross-lingual SemanticThis paper introduces a new task on Multilingual and Cross-lingual Semantic Word Similarity which measures the semantic similarity of word pairs within and across five languages: English, Farsi, German, Italian and Spanish.
no code implementations • ACL 2017 • Claudio Delli Bovi, Jose Camacho-Collados, Aless Raganato, ro, Roberto Navigli
Parallel corpora are widely used in a variety of Natural Language Processing tasks, from Machine Translation to cross-lingual Word Sense Disambiguation, where parallel sentences can be exploited to automatically generate high-quality sense annotations on a large scale.
no code implementations • EACL 2017 • Aless Raganato, ro, Jose Camacho-Collados, Roberto Navigli
In this paper we develop a unified evaluation framework and analyze the performance of various Word Sense Disambiguation systems in a fair setup.
Ranked #4 on
Word Sense Disambiguation
on Knowledge-based:
no code implementations • EACL 2017 • Jose Camacho-Collados, Roberto Navigli
In this paper we present BabelDomains, a unified resource which provides lexical items with information about domains of knowledge.
no code implementations • CONLL 2017 • Massimiliano Mancini, Jose Camacho-Collados, Ignacio Iacobacci, Roberto Navigli
Word embeddings are widely used in Natural Language Processing, mainly due to their success in capturing semantic information from massive corpora.
no code implementations • LREC 2016 • José Camacho Collados, Claudio Delli Bovi, Alessandro Raganato, Roberto Navigli
Linking concepts and named entities to knowledge bases has become a crucial Natural Language Understanding task.
Natural Language Understanding
Open Information Extraction
+2
no code implementations • 2 Aug 2016 • José Camacho-Collados, Ignacio Iacobacci, Roberto Navigli, Mohammad Taher Pilehvar
Representing the semantics of linguistic items in a machine-interpretable form has been a major goal of Natural Language Processing since its earliest days.
no code implementations • JEPTALNRECITAL 2015 • Roberto Navigli
Multilinguality is a key feature of today{'}s Web, and it is this feature that we leverage and exploit in our research work at the Sapienza University of Rome{'}s Linguistic Computing Laboratory, which I am going to overview and showcase in this talk.
no code implementations • TACL 2015 • Claudio Delli Bovi, Luca Telesca, Roberto Navigli
The output of DefIE is a high-quality knowledge base consisting of several million automatically acquired semantic relations.
no code implementations • LREC 2014 • Andrea Moro, Roberto Navigli, Francesco Maria Tucci, Rebecca J. Passonneau
Finally, we estimate the quality of our annotations using both manually-tagged named entities and word senses, obtaining an accuracy of roughly 70{\%} for both named entities and word sense annotations.
no code implementations • LREC 2014 • Maud Ehrmann, Francesco Cecconi, Daniele Vannella, John Philip McCrae, Philipp Cimiano, Roberto Navigli
Recent years have witnessed a surge in the amount of semantic information published on the Web.
no code implementations • 18 Jan 2014 • Tiziano Flati, Roberto Navigli
Bilingual machine-readable dictionaries are knowledge resources useful in many automatic tasks.
no code implementations • TACL 2014 • Andrea Moro, Aless Raganato, ro, Roberto Navigli
Entity Linking (EL) and Word Sense Disambiguation (WSD) both address the lexical ambiguity of language.
Ranked #3 on
Word Sense Disambiguation
on Knowledge-based:
no code implementations • TACL 2014 • David Jurgens, Roberto Navigli
Annotated data is prerequisite for many NLP applications.
no code implementations • LREC 2012 • Paola Velardi, Roberto Navigli, Stefano Faralli, Juana Maria Ruiz Martinez
Our method assigns a similarity value B{\textasciicircum}i{\_}(l, r) to the learned (l) and reference (r) taxonomy for each cut i of the corresponding anonymised hierarchies, starting from the topmost nodes down to the leaf concepts.