Search Results for author: Pepa Atanasova

Found 19 papers, 7 papers with code

Explaining Interactions Between Text Spans

1 code implementation20 Oct 2023 Sagnik Ray Choudhury, Pepa Atanasova, Isabelle Augenstein

Reasoning over spans of tokens from different parts of the input is essential for natural language understanding (NLU) tasks such as fact-checking (FC), machine reading comprehension (MRC) or natural language inference (NLI).

Community Detection Decision Making +6

bgGLUE: A Bulgarian General Language Understanding Evaluation Benchmark

2 code implementations4 Jun 2023 Momchil Hardalov, Pepa Atanasova, Todor Mihaylov, Galia Angelova, Kiril Simov, Petya Osenova, Ves Stoyanov, Ivan Koychev, Preslav Nakov, Dragomir Radev

We run the first systematic evaluation of pre-trained language models for Bulgarian, comparing and contrasting results across the nine tasks in the benchmark.

Fact Checking named-entity-recognition +5

Fact Checking with Insufficient Evidence

no code implementations5 Apr 2022 Pepa Atanasova, Jakob Grue Simonsen, Christina Lioma, Isabelle Augenstein

To this end, we are the first to study what information FC models consider sufficient by introducing a novel task and advancing it with three main contributions.

Data Augmentation Fact Checking +2

Diagnostics-Guided Explanation Generation

no code implementations8 Sep 2021 Pepa Atanasova, Jakob Grue Simonsen, Christina Lioma, Isabelle Augenstein

When such annotations are not available, explanations are often selected as those portions of the input that maximise a downstream task's performance, which corresponds to optimising an explanation's Faithfulness to a given model.

Explanation Generation Sentence

A Diagnostic Study of Explainability Techniques for Text Classification

1 code implementation EMNLP 2020 Pepa Atanasova, Jakob Grue Simonsen, Christina Lioma, Isabelle Augenstein

Recent developments in machine learning have introduced models that approach human performance at the cost of increased architectural complexity.

General Classification text-classification +1

Generating Label Cohesive and Well-Formed Adversarial Claims

1 code implementation EMNLP 2020 Pepa Atanasova, Dustin Wright, Isabelle Augenstein

However, for inference tasks such as fact checking, these triggers often inadvertently invert the meaning of instances they are inserted in.

Fact Checking Language Modelling +2

Multi-Hop Fact Checking of Political Claims

1 code implementation10 Sep 2020 Wojciech Ostrowski, Arnav Arora, Pepa Atanasova, Isabelle Augenstein

We: 1) construct a small annotated dataset, PolitiHop, of evidence sentences for claim verification; 2) compare it to existing multi-hop datasets; and 3) study how to transfer knowledge from more extensive in- and out-of-domain resources to PolitiHop.

Claim Verification Fact Checking +1

SOLID: A Large-Scale Semi-Supervised Dataset for Offensive Language Identification

no code implementations Findings (ACL) 2021 Sara Rosenthal, Pepa Atanasova, Georgi Karadzhov, Marcos Zampieri, Preslav Nakov

The widespread use of offensive content in social media has led to an abundance of research in detecting language such as hate speech, cyberbullying, and cyber-aggression.

Language Identification

Generating Fact Checking Explanations

no code implementations ACL 2020 Pepa Atanasova, Jakob Grue Simonsen, Christina Lioma, Isabelle Augenstein

Most existing work on automated fact checking is concerned with predicting the veracity of claims based on metadata, social network spread, language used in claims, and, more recently, evidence supporting or denying claims.

Fact Checking Informativeness

Joint Emotion Label Space Modelling for Affect Lexica

no code implementations20 Nov 2019 Luna De Bruyne, Pepa Atanasova, Isabelle Augenstein

Emotion lexica are commonly used resources to combat data poverty in automatic emotion detection.

Emotion Recognition valid

Automatic Fact-Checking Using Context and Discourse Information

1 code implementation4 Aug 2019 Pepa Atanasova, Preslav Nakov, Lluís Màrquez, Alberto Barrón-Cedeño, Georgi Karadzhov, Tsvetomila Mihaylova, Mitra Mohtarami, James Glass

We study the problem of automatic fact-checking, paying special attention to the impact of contextual and discourse information.

Fact Checking

Evaluating Variable-Length Multiple-Option Lists in Chatbots and Mobile Search

no code implementations25 May 2019 Pepa Atanasova, Georgi Karadzhov, Yasen Kiprov, Preslav Nakov, Fabrizio Sebastiani

While typically a user would expect a single response at any utterance, a system could also return multiple options for the user to select from, based on different system understandings of the user's intent.

Question Answering

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