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Momchil Hardalov

9 accepted papers

2025

Understanding and Improving Information Preservation in Prompt Compression for LLMs

EMNLP 2025

Recent advancements in large language models (LLMs) have enabled their successful application to a broad range of tasks. However, in information-intensive tasks, the prompt length can grow fast, leading to increased computational requirements, performance degradation, and induced biases from irrelev

2024

DEM: Distribution Edited Model for Training with Mixed Data Distributions

EMNLP 2024main

Training with mixed data distributions is a common and important part of creating multi-task and instruction-following models. The diversity of the data distributions and cost of joint training makes the optimization procedure extremely challenging. Data mixing methods partially address this problem…

2024

Detecting Check-Worthy Claims in Political Debates, Speeches, and Interviews Using Audio Data

ICASSP 2024accepted

Developing tools to automatically detect check-worthy claims in political debates and speeches can greatly help moderators of debates, journalists, and fact-checkers. While previous work on this problem has focused exclusively on the text modality, here we explore the utility of the audio modality a…

Cited by 0SourceScholar
2024

Factual Confidence of LLMs: on Reliability and Robustness of Current Estimators

ACL 2024long

Large Language Models (LLMs) tend to be unreliable on fact-based answers.To address this problem, NLP researchers have proposed a range of techniques to estimate LLM’s confidence over facts. However, due to the lack of a systematic comparison, it is not clear how the different methods compare to one…

2023

Diable: Efficient Dialogue State Tracking as Operations on Tables

ACL 2023findings

Sequence-to-sequence state-of-the-art systems for dialogue state tracking (DST) use the full dialogue history as input, represent the current state as a list with all the slots, and generate the entire state from scratch at each dialogue turn. This approach is inefficient, especially when the number…

2023

bgGLUE: A Bulgarian General Language Understanding Evaluation Benchmark

ACL 2023long

We present bgGLUE (Bulgarian General Language Understanding Evaluation), a benchmark for evaluating language models on Natural Language Understanding (NLU) tasks in Bulgarian. Our benchmark includes NLU tasks targeting a variety of NLP problems (e.g., natural language inference, fact-checking, named…

2022

A Survey on Stance Detection for Mis- and Disinformation Identification

NAACL 2022findings

Understanding attitudes expressed in texts, also known as stance detection, plays an important role in systems for detecting false information online, be it misinformation (unintentionally false) or disinformation (intentionally false information). Stance detection has been framed in different ways,…

Cited by 155SourcePDFScholar
2022

Few-Shot Cross-Lingual Stance Detection with Sentiment-Based Pre-training

AAAI 2022technical

The goal of stance detection is to determine the viewpoint expressed in a piece of text towards a target. These viewpoints or contexts are often expressed in many different languages depending on the user and the platform, which can be a local news outlet, a social media platform, a news forum, etc.…

2021

Cross-Domain Label-Adaptive Stance Detection

EMNLP 2021main

Stance detection concerns the classification of a writer’s viewpoint towards a target. There are different task variants, e.g., stance of a tweet vs. a full article, or stance with respect to a claim vs. an (implicit) topic. Moreover, task definitions vary, which includes the label inventory, the da…