Search Results for author: Jacopo Urbani

Found 11 papers, 4 papers with code

Chasing Streams with Existential Rules

no code implementations4 May 2022 Jacopo Urbani, Markus Krötzsch, Thomas Eiter

We study reasoning with existential rules to perform query answering over streams of data.

Tribrid: Stance Classification with Neural Inconsistency Detection

1 code implementation EMNLP 2021 Song Yang, Jacopo Urbani

In the second case, we show that using the confidence scores to remove doubtful predictions allows our method to achieve human-like performance over the retained information, which is still a sizable part of the original input.

Classification Fact Checking +1

Tab2Know: Building a Knowledge Base from Tables in Scientific Papers

1 code implementation28 Jul 2021 Benno Kruit, Hongyu He, Jacopo Urbani

First, our pipeline applies weakly supervised classifiers to recognize the type of tables and columns, with the help of a data labeling system and an ontology specifically designed for our purpose.

Materializing Knowledge Bases via Trigger Graphs

no code implementations4 Feb 2021 Efthymia Tsamoura, David Carral, Enrico Malizia, Jacopo Urbani

The chase is a well-established family of algorithms used to materialize Knowledge Bases (KBs), like Knowledge Graphs (KGs), to tackle important tasks like query answering under dependencies or data cleaning.

Knowledge Graphs

Checking Chase Termination over Ontologies of Existential Rules with Equality

no code implementations25 Nov 2019 David Carral, Jacopo Urbani

Therefore, one can apply existing acyclicity notions to check chase termination over an axiomatisation of an ontology and then use the original ontology for reasoning.

Datalog Reasoning over Compressed RDF Knowledge Bases

no code implementations27 Aug 2019 Pan Hu, Jacopo Urbani, Boris Motik, Ian Horrocks

Materialisation is often used in RDF systems as a preprocessing step to derive all facts implied by given RDF triples and rules.

Word Sense Disambiguation with LSTM: Do We Really Need 100 Billion Words?

no code implementations9 Dec 2017 Minh Le, Marten Postma, Jacopo Urbani

Recently, Yuan et al. (2016) have shown the effectiveness of using Long Short-Term Memory (LSTM) for performing Word Sense Disambiguation (WSD).

Word Sense Disambiguation

KOGNAC: Efficient Encoding of Large Knowledge Graphs

1 code implementation16 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.

Knowledge Graphs

Column-Oriented Datalog Materialization for Large Knowledge Graphs (Extended Technical Report)

1 code implementation28 Nov 2015 Jacopo Urbani, Ceriel Jacobs, Markus Krötzsch

The evaluation of Datalog rules over large Knowledge Graphs (KGs) is essential for many applications.

Knowledge Graphs

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