no code implementations • EMNLP 2021 • Anna Tigunova, Paramita Mirza, Andrew Yates, Gerhard Weikum
Automatically extracting interpersonal relationships of conversation interlocutors can enrich personal knowledge bases to enhance personalized search, recommenders and chatbots.
no code implementations • EACL (LANTERN) 2021 • Sreyasi Nag Chowdhury, Rajarshi Bhowmik, Hareesh Ravi, Gerard de Melo, Simon Razniewski, Gerhard Weikum
Modern web content - news articles, blog posts, educational resources, marketing brochures - is predominantly multimodal.
no code implementations • EMNLP 2020 • Anna Tigunova, Andrew Yates, Paramita Mirza, Gerhard Weikum
Personal knowledge about users{'} professions, hobbies, favorite food, and travel preferences, among others, is a valuable asset for individualized AI, such as recommenders or chatbots.
no code implementations • 4 May 2024 • Sneha Singhania, Simon Razniewski, Gerhard Weikum
Methods for relation extraction from text mostly focus on high precision, at the cost of limited recall.
no code implementations • 23 Feb 2024 • Zhen Jia, Philipp Christmann, Gerhard Weikum
The method has three stages: (i) understanding the question and its temporal conditions, (ii) retrieving evidence from all sources, and (iii) faithfully answering the question.
no code implementations • 16 Feb 2024 • Tuan-Phong Nguyen, Simon Razniewski, Gerhard Weikum
Notably, despite LLMs inherently possessing cultural knowledge, we find that adding knowledge from MANGO improves the overall quality, specificity, and cultural sensitivity of dialogue responses, as judged by human annotators.
no code implementations • 2 Nov 2023 • Ghazaleh Haratinezhad Torbati, Anna Tigunova, Andrew Yates, Gerhard Weikum
Recommender systems are most successful for popular items and users with ample interactions (likes, ratings etc.).
no code implementations • 23 Oct 2023 • Blerta Veseli, Simon Razniewski, Jan-Christoph Kalo, Gerhard Weikum
Structured knowledge bases (KBs) are an asset for search engines and other applications, but are inevitably incomplete.
no code implementations • 20 Oct 2023 • Magdalena Kaiser, Rishiraj Saha Roy, Gerhard Weikum
This implies that training is limited to surface forms seen in the respective datasets, and evaluation is on a small set of held-out questions.
1 code implementation • 6 Jul 2023 • Sneha Singhania, Simon Razniewski, Gerhard Weikum
The widespread usage of latent language representations via pre-trained language models (LMs) suggests that they are a promising source of structured knowledge.
1 code implementation • 30 Jun 2023 • Lihu Chen, Simon Razniewski, Gerhard Weikum
To evaluate our method and various baselines, we introduce a novel dataset, called MALT, rooted in Wikidata.
no code implementations • 21 Jun 2023 • Philipp Christmann, Rishiraj Saha Roy, Gerhard Weikum
Fact-centric question answering (QA) often requires access to multiple, heterogeneous, information sources.
1 code implementation • 2 May 2023 • Philipp Christmann, Rishiraj Saha Roy, Gerhard Weikum
In conversational question answering, users express their information needs through a series of utterances with incomplete context.
1 code implementation • 20 Mar 2023 • Blerta Veseli, Sneha Singhania, Simon Razniewski, Gerhard Weikum
In a second step, we perform a human evaluation on predictions that are not yet in the KB, as only this provides real insights into the added value over existing KBs.
1 code implementation • 8 Mar 2023 • Shrestha Ghosh, Simon Razniewski, Gerhard Weikum
Questions on class cardinality comparisons are quite tricky to answer and come with its own challenges.
2 code implementations • 14 Oct 2022 • Tuan-Phong Nguyen, Simon Razniewski, Aparna Varde, Gerhard Weikum
Commonsense knowledge, which is crucial for robust human-centric AI, is covered by a small number of structured knowledge projects.
1 code implementation • 15 Sep 2022 • Shrestha Ghosh, Simon Razniewski, Gerhard Weikum
In this work we address the challenging case of answering count queries in web search, such as ``number of songs by John Lennon''.
no code implementations • 19 Aug 2022 • Hiba Arnaout, Simon Razniewski, Gerhard Weikum, Jeff Z. Pan
This way, positive statements about comparable concepts that are absent for the target concept become seeds for negative statement candidates.
no code implementations • 25 Apr 2022 • Philipp Christmann, Rishiraj Saha Roy, Gerhard Weikum
Conversational question answering (ConvQA) tackles sequential information needs where contexts in follow-up questions are left implicit.
1 code implementation • 11 Apr 2022 • Shrestha Ghosh, Simon Razniewski, Gerhard Weikum
A challenging case in web search and question answering are count queries, such as \textit{"number of songs by John Lennon"}.
1 code implementation • 30 Nov 2021 • Tuan-Phong Nguyen, Simon Razniewski, Julien Romero, Gerhard Weikum
However, they are restricted in their expressiveness to subject-predicate-object (SPO) triples with simple concepts for S and strings for P and O.
no code implementations • 26 Nov 2021 • Sneha Singhania, Simon Razniewski, Gerhard Weikum
We employ methods combining features with statistical models like TF-IDF and language models like BERT.
no code implementations • 10 Oct 2021 • Simon Razniewski, Andrew Yates, Nora Kassner, Gerhard Weikum
Pre-trained language models (LMs) have recently gained attention for their potential as an alternative to (or proxy for) explicit knowledge bases (KBs).
1 code implementation • 18 Sep 2021 • Zhen Jia, Soumajit Pramanik, Rishiraj Saha Roy, Gerhard Weikum
This work presents EXAQT, the first end-to-end system for answering complex temporal questions that have multiple entities and predicates, and associated temporal conditions.
no code implementations • 10 Sep 2021 • Ghazaleh Haratinezhad Torbati, Andrew Yates, Gerhard Weikum
The paper develops an expressive model and effective methods for personalizing search-based entity recommendations.
no code implementations • 10 Sep 2021 • Ghazaleh Haratinezhad Torbati, Andrew Yates, Gerhard Weikum
Prior work on personalizing web search results has focused on considering query-and-click logs to capture users individual interests.
no code implementations • 9 Sep 2021 • Preethi Lahoti, Krishna P. Gummadi, Gerhard Weikum
Reliably predicting potential failure risks of machine learning (ML) systems when deployed with production data is a crucial aspect of trustworthy AI.
1 code implementation • 19 Aug 2021 • Philipp Christmann, Rishiraj Saha Roy, Gerhard Weikum
Answering complex questions over knowledge bases (KB-QA) faces huge input data with billions of facts, involving millions of entities and thousands of predicates.
1 code implementation • 19 Aug 2021 • Soumajit Pramanik, Jesujoba Alabi, Rishiraj Saha Roy, Gerhard Weikum
Some of these systems incorporate textual sources as additional evidence for the answering process, but cannot compute answers that are present in text alone.
1 code implementation • ACL 2021 • Paramita Mirza, Mostafa Abouhamra, Gerhard Weikum
High-quality alignment between movie scripts and plot summaries is an asset for learning to summarize stories and to generate dialogues.
no code implementations • AKBC 2021 • Cuong Xuan Chu, Simon Razniewski, Gerhard Weikum
Knowledge base construction has recently been extended to fictional domains like multi-volume novels and TV/movie series, aiming to support explorative queries for fans and sub-culture studies by humanities researchers.
Cultural Vocal Bursts Intensity Prediction Relation Extraction
no code implementations • ACL 2021 • Tuan-Phong Nguyen, Simon Razniewski, Gerhard Weikum
ASCENT is a fully automated methodology for extracting and consolidating commonsense assertions from web contents (Nguyen et al., WWW 2021).
1 code implementation • 11 May 2021 • Magdalena Kaiser, Rishiraj Saha Roy, Gerhard Weikum
We present a reinforcement learning model, termed CONQUER, that can learn from a conversational stream of questions and reformulations.
no code implementations • EACL 2021 • Sreyasi Nag Chowdhury, Simon Razniewski, Gerhard Weikum
The Internet contains a multitude of social media posts and other of stories where text is interspersed with images.
1 code implementation • 15 Feb 2021 • Azin Ghazimatin, Soumajit Pramanik, Rishiraj Saha Roy, Gerhard Weikum
System-provided explanations for recommendations are an important component towards transparent and trustworthy AI.
2 code implementations • 13 Nov 2020 • Liqiang Wang, Xiaoyu Shen, Gerard de Melo, Gerhard Weikum
Prior work has focused on supervised learning with training data from the same domain.
1 code implementation • 2 Nov 2020 • Tuan-Phong Nguyen, Simon Razniewski, Gerhard Weikum
Prior works like ConceptNet, TupleKB and others compiled large CSK collections, but are restricted in their expressiveness to subject-predicate-object (SPO) triples with simple concepts for S and monolithic strings for P and O.
no code implementations • EMNLP 2020 • Cuong Xuan Chu, Simon Razniewski, Gerhard Weikum
Fiction and fantasy are archetypes of long-tail domains that lack suitable NLP methodologies and tools.
no code implementations • 24 Sep 2020 • Gerhard Weikum, Luna Dong, Simon Razniewski, Fabian Suchanek
Equipping machines with comprehensive knowledge of the world's entities and their relationships has been a long-standing goal of AI.
1 code implementation • 7 May 2020 • Shrestha Ghosh, Simon Razniewski, Gerhard Weikum
Predicate constraints of general-purpose knowledge bases (KBs) like Wikidata, DBpedia and Freebase are often limited to subproperty, domain and range constraints.
no code implementations • LREC 2020 • Anna Tigunova, Paramita Mirza, Andrew Yates, Gerhard Weikum
To the best of our knowledge, RedDust is the first annotated language resource about Reddit users at large scale.
1 code implementation • 27 Apr 2020 • Magdalena Kaiser, Rishiraj Saha Roy, Gerhard Weikum
In this work, we demonstrate CROWN (Conversational passage ranking by Reasoning Over Word Networks): an unsupervised yet effective system for conversational QA with passage responses, that supports several modes of context propagation over multiple turns.
1 code implementation • 6 Mar 2020 • Shrestha Ghosh, Simon Razniewski, Gerhard Weikum
This paper focuses on set-valued predicates, i. e., the relationship between an entity and a set of entities.
no code implementations • AKBC 2020 • Hiba Arnaout, Simon Razniewski, Gerhard Weikum
Negative statements would be important to overcome current limitations of question answering, yet due to their potential abundance, any effort towards compiling them needs a tight coupling with ranking.
1 code implementation • AKBC 2020 • Yohan Chalier, Simon Razniewski, Gerhard Weikum
Each concept is treated in isolation from other concepts, and the only quantitative measure (or ranking) of properties is a confidence score that the statement is valid.
no code implementations • 13 Jan 2020 • Hiba Arnaout, Simon Razniewski, Gerhard Weikum, Jeff Z. Pan
Negative statements are useful to overcome limitations of question answering systems that are mainly geared for positive questions; they can also contribute to informative summaries of entities.
1 code implementation • 19 Nov 2019 • Azin Ghazimatin, Oana Balalau, Rishiraj Saha Roy, Gerhard Weikum
Interpretable explanations for recommender systems and other machine learning models are crucial to gain user trust.
1 code implementation • 7 Nov 2019 • Magdalena Kaiser, Rishiraj Saha Roy, Gerhard Weikum
Information needs around a topic cannot be satisfied in a single turn; users typically ask follow-up questions referring to the same theme and a system must be capable of understanding the conversational context of a request to retrieve correct answers.
no code implementations • IJCNLP 2019 • Simon Razniewski, Nitisha Jain, Paramita Mirza, Gerhard Weikum
Scalar implicatures are language features that imply the negation of stronger statements, e. g., {``}She was married twice{''} typically implicates that she was not married thrice.
1 code implementation • IJCNLP 2019 • Kashyap Popat, Subhabrata Mukherjee, Andrew Yates, Gerhard Weikum
Controversial claims are abundant in online media and discussion forums.
1 code implementation • 8 Oct 2019 • Philipp Christmann, Rishiraj Saha Roy, Abdalghani Abujabal, Jyotsna Singh, Gerhard Weikum
Fact-centric information needs are rarely one-shot; users typically ask follow-up questions to explore a topic.
no code implementations • 2 Sep 2019 • Sreyasi Nag Chowdhury, Niket Tandon, Hakan Ferhatosmanoglu, Gerhard Weikum
CBIR now gains semantic expressiveness by advances in deep-learning-based detection of visual labels.
no code implementations • WS 2016 • Sreyasi Nag Chowdhury, Niket Tandon, Gerhard Weikum
With the rise in popularity of social media, images accompanied by contextual text form a huge section of the web.
no code implementations • 2 Sep 2019 • Sreyasi Nag Chowdhury, Simon Razniewski, Gerhard Weikum
Multimodal contents have become commonplace on the Internet today, manifested as news articles, social media posts, and personal or business blog posts.
no code implementations • 9 Aug 2019 • Zhen Jia, Abdalghani Abujabal, Rishiraj Saha Roy, Jannik Stroetgen, Gerhard Weikum
An important case, addressed here, is that of temporal questions, where cues for temporal relations need to be discovered and handled.
1 code implementation • 8 Aug 2019 • Azin Ghazimatin, Rishiraj Saha Roy, Gerhard Weikum
We model the user's local neighborhood on the platform as an interaction graph, a form of heterogeneous information network constructed solely from information that is easily accessible to the concerned user.
no code implementations • 1 Aug 2019 • Xiaolu Lu, Soumajit Pramanik, Rishiraj Saha Roy, Abdalghani Abujabal, Yafang Wang, Gerhard Weikum
Direct answering of questions that involve multiple entities and relations is a challenge for text-based QA.
no code implementations • 2 Jul 2019 • Preethi Lahoti, Krishna P. Gummadi, Gerhard Weikum
We revisit the notion of individual fairness proposed by Dwork et al. A central challenge in operationalizing their approach is the difficulty in eliciting a human specification of a similarity metric.
no code implementations • ACL 2019 • Bayu Distiawan Trisedya, Gerhard Weikum, Jianzhong Qi, Rui Zhang
This way, NED errors may cause extraction errors that affect the overall precision and recall. To address this problem, we propose an end-to-end relation extraction model for KB enrichment based on a neural encoder-decoder model.
2 code implementations • 27 May 2019 • Julien Romero, Simon Razniewski, Koninika Pal, Jeff Z. Pan, Archit Sakhadeo, Gerhard Weikum
Commonsense knowledge about object properties, human behavior and general concepts is crucial for robust AI applications.
1 code implementation • 24 Apr 2019 • Anna Tigunova, Andrew Yates, Paramita Mirza, Gerhard Weikum
Open-domain dialogue agents must be able to converse about many topics while incorporating knowledge about the user into the conversation.
no code implementations • 29 Jan 2019 • Cuong Xuan Chu, Simon Razniewski, Gerhard Weikum
Taxonomies are important building blocks of structured knowledge bases, and their construction from text sources and Wikipedia has received much attention.
1 code implementation • EMNLP 2018 • Marco Ponza, Luciano del Corro, Gerhard Weikum
This work introduces fact salience: The task of generating a machine-readable representation of the most prominent information in a text document as a set of facts.
no code implementations • NAACL 2019 • Abdalghani Abujabal, Rishiraj Saha Roy, Mohamed Yahya, Gerhard Weikum
To bridge the gap between the capabilities of the state-of-the-art in factoid question answering (QA) and what users ask, we need large datasets of real user questions that capture the various question phenomena users are interested in, and the diverse ways in which these questions are formulated.
2 code implementations • EMNLP 2018 • Kashyap Popat, Subhabrata Mukherjee, Andrew Yates, Gerhard Weikum
Misinformation such as fake news is one of the big challenges of our society.
1 code implementation • 10 Jul 2018 • Paramita Mirza, Simon Razniewski, Fariz Darari, Gerhard Weikum
In a large-scale experiment, we demonstrate the potential for knowledge base enrichment by applying CINEX to 2, 474 frequent relations in Wikidata.
no code implementations • ACL 2018 • Prabal Agarwal, Jannik Str{\"o}tgen, Luciano del Corro, Johannes Hoffart, Gerhard Weikum
Named Entity Disambiguation (NED) systems perform well on news articles and other texts covering a specific time interval.
no code implementations • ACL 2018 • Dominic Seyler, Tatiana Dembelova, Luciano del Corro, Johannes Hoffart, Gerhard Weikum
In this work, we discuss the importance of external knowledge for performing Named Entity Recognition (NER).
no code implementations • 4 Jun 2018 • Preethi Lahoti, Krishna P. Gummadi, Gerhard Weikum
We demonstrate the versatility of our method by applying it to classification and learning-to-rank tasks on a variety of real-world datasets.
no code implementations • 4 May 2018 • Asia J. Biega, Krishna P. Gummadi, Gerhard Weikum
We formulate the challenge of achieving amortized individual fairness subject to constraints on ranking quality as an online optimization problem and show that it can be solved as an integer linear program.
no code implementations • IJCNLP 2017 • David Ziegler, Abdalghani Abujabal, Rishiraj Saha Roy, Gerhard Weikum
This paper investigates the problem of answering compositional factoid questions over knowledge bases (KB) under efficiency constraints.
no code implementations • 11 Sep 2017 • Dominic Seyler, Tatiana Dembelova, Luciano del Corro, Johannes Hoffart, Gerhard Weikum
KnowNER is a multilingual Named Entity Recognition (NER) system that leverages different degrees of external knowledge.
Multilingual Named Entity Recognition named-entity-recognition +2
no code implementations • EMNLP 2017 • Abdalghani Abujabal, Rishiraj Saha Roy, Mohamed Yahya, Gerhard Weikum
We present QUINT, a live system for question answering over knowledge bases.
no code implementations • 7 May 2017 • Subhabrata Mukherjee, Gerhard Weikum
This paper presents a model to systematically analyze the different interactions in a news community between users, news, and sources.
no code implementations • 7 May 2017 • Subhabrata Mukherjee, Stephan Guennemann, Gerhard Weikum
Online review communities are dynamic as users join and leave, adopt new vocabulary, and adapt to evolving trends.
no code implementations • 7 May 2017 • Subhabrata Mukherjee, Sourav Dutta, Gerhard Weikum
Online reviews provide viewpoints on the strengths and shortcomings of products/services, influencing potential customers' purchasing decisions.
no code implementations • 6 May 2017 • Subhabrata Mukherjee, Gerhard Weikum, Cristian Danescu-Niculescu-Mizil
Online health communities are a valuable source of information for patients and physicians.
no code implementations • 6 May 2017 • Subhabrata Mukherjee, Hemank Lamba, Gerhard Weikum
As only item ratings and review texts are observables, we capture the user's experience and interests in a latent model learned from her reviews, vocabulary and writing style.
no code implementations • 6 May 2017 • Subhabrata Mukherjee, Kashyap Popat, Gerhard Weikum
In this work, we attempt to automatically identify review quality in terms of its helpfulness to the end consumers.
no code implementations • ACL 2017 • Paramita Mirza, Simon Razniewski, Fariz Darari, Gerhard Weikum
Information extraction (IE) from text has largely focused on relations between individual entities, such as who has won which award.
1 code implementation • 16 Apr 2016 • Jacopo Urbani, Sourav Dutta, Sairam Gurajada, Gerhard Weikum
We propose KOGNAC, a dictionary-encoding algorithm designed to improve SPARQL querying with a judicious combination of statistical and semantic techniques.
no code implementations • TACL 2016 • Dat Ba Nguyen, Martin Theobald, Gerhard Weikum
Methods for Named Entity Recognition and Disambiguation (NERD) perform NER and NED in two separate stages.
no code implementations • TACL 2015 • Sourav Dutta, Gerhard Weikum
Second, we reduce the computational cost by a new algorithm that embeds sample-based bisection, using spectral clustering or graph partitioning, in a hierarchical clustering process.
no code implementations • TACL 2014 • Lizhen Qu, Yi Zhang, Rui Wang, Lili Jiang, Rainer Gemulla, Gerhard Weikum
Extracting instances of sentiment-oriented relations from user-generated web documents is important for online marketing analysis.
no code implementations • 1 Jul 2011 • Johannes Hoffart, Mohamed Amir Yosef, Ilaria Bordino, Hagen Fürstenau, Manfred Pinkal, Marc Spaniol, Bilyana Taneva, Stefan Thater, Gerhard Weikum
Disambiguating named entities in naturallanguage text maps mentions of ambiguous names onto canonical entities like people or places, registered in a knowledge base such as DBpedia or YAGO.
Ranked #15 on Entity Linking on AIDA-CoNLL