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Shafiuddin Rehan Ahmed

5 accepted papers

2025

On the Role of Semantic Proto-roles in Semantic Analysis: What do LLMs know about agency?

ACL 2025finding

Large language models (LLMs) are increasingly used in decision-making contexts, yet their ability to reason over event structure—an important component in the situational awareness needed to make complex decisions—is not well understood. By operationalizing proto-role theory, which characterizes age…

2024

Generating Harder Cross-document Event Coreference Resolution Datasets using Metaphoric Paraphrasing

ACL 2024short

The most popular Cross-Document Event Coreference Resolution (CDEC) datasets fail to convey the true difficulty of the task, due to the lack of lexical diversity between coreferring event triggers (words or phrases that refer to an event). Furthermore, there is a dearth of event datasets for figurat…

2024

Linear Cross-document Event Coreference Resolution with X-AMR

COLING 2024main

Event Coreference Resolution (ECR) as a pairwise mention classification task is expensive both for automated systems and manual annotations. The task’s quadratic difficulty is exacerbated when using Large Language Models (LLMs), making prompt engineering for ECR prohibitively costly. In this work, w…

2024

Multimodal Cross-Document Event Coreference Resolution Using Linear Semantic Transfer and Mixed-Modality Ensembles

COLING 2024main

Event coreference resolution (ECR) is the task of determining whether distinct mentions of events within a multi-document corpus are actually linked to the same underlying occurrence. Images of the events can help facilitate resolution when language is ambiguous. Here, we propose a multimodal cross-…

2023

2*n is better than n2: Decomposing Event Coreference Resolution into Two Tractable Problems

ACL 2023findings

Event Coreference Resolution (ECR) is the task of linking mentions of the same event either within or across documents. Most mention pairs are not coreferent, yet many that are coreferent can be identified through simple techniques such as lemma matching of the event triggers or the sentences in whi…