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Maria Leonor Pacheco

9 accepted papers

2025

CLIX: Cross-Lingual Explanations of Idiomatic Expressions

ACL 2025finding

Automated definition generation systems have been proposed to support vocabulary expansion for language learners. The main barrier to the success of these systems is that learners often struggle to understand definitions due to the presence of potentially unfamiliar words and grammar, particularly w…

Cited by 0SourcePDFScholar
2025

Explaining Puzzle Solutions in Natural Language: An Exploratory Study on 6x6 Sudoku

ACL 2025finding

The success of Large Language Models (LLMs) in human-AI collaborative decision-making hinges on their ability to provide trustworthy, gradual, and tailored explanations. Solving complex puzzles, such as Sudoku, offers a canonical example of this collaboration, where clear and customized explanations…

2025

Identifying Power Relations in Conversations using Multi-Agent Social Reasoning

NAACL 2025short

Large language models (LLMs) struggle in social science domains, where critical thinking and human-level inference are crucial. In this work, we propose a multi-agent social reasoning framework that leverages the generative and reasoning capabilities of LLMs to generate and evaluate reasons from mul…

2024

Framing in the Presence of Supporting Data: A Case Study in U.S. Economic News

ACL 2024long

The mainstream media has much leeway in what it chooses to cover and how it covers it. These choices have real-world consequences on what people know and their subsequent behaviors. However, the lack of objective measures to evaluate editorial choices makes research in this area particularly difficu…

Cited by 0SourcePDFScholar
2023

Interactive Concept Learning for Uncovering Latent Themes in Large Text Collections

ACL 2023findings

Experts across diverse disciplines are often interested in making sense of large text collections. Traditionally, this challenge is approached either by noisy unsupervised techniques such as topic models, or by following a manual theme discovery process. In this paper, we expand the definition of a…

Cited by 17SourcePDFScholar
2022

A Holistic Framework for Analyzing the COVID-19 Vaccine Debate

NAACL 2022long

The Covid-19 pandemic has led to infodemic of low quality information leading to poor health decisions. Combating the outcomes of this infodemic is not only a question of identifying false claims, but also reasoning about the decisions individuals make. In this work we propose a holistic analysis fr…

2022

Tackling Fake News Detection by Continually Improving Social Context Representations using Graph Neural Networks

ACL 2022long

Easy access, variety of content, and fast widespread interactions are some of the reasons making social media increasingly popular. However, this rise has also enabled the propagation of fake news, text published by news sources with an intent to spread misinformation and sway beliefs. Detecting it…

2021

Identifying Morality Frames in Political Tweets using Relational Learning

EMNLP 2021main

Extracting moral sentiment from text is a vital component in understanding public opinion, social movements, and policy decisions. The Moral Foundation Theory identifies five moral foundations, each associated with a positive and negative polarity. However, moral sentiment is often motivated by its…

2021

Modeling Human Mental States with an Entity-based Narrative Graph

NAACL 2021long

Understanding narrative text requires capturing characters’ motivations, goals, and mental states. This paper proposes an Entity-based Narrative Graph (ENG) to model the internal- states of characters in a story. We explicitly model entities, their interactions and the context in which they appear,…