Abhinav Sethy


2023

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Learning to Retrieve Engaging Follow-Up Queries
Christopher Richardson | Sudipta Kar | Anjishnu Kumar | Anand Ramachandran | Zeynab Raeesy | Omar Khan | Abhinav Sethy
Findings of the Association for Computational Linguistics: EACL 2023

Open domain conversational agents can answer a broad range of targeted queries. However, the sequential nature of interaction with these systems makes knowledge exploration a lengthy task which burdens the user with asking a chain of well phrased questions. In this paper, we present a retrieval based system and associated dataset for predicting the next questions that the user might have. Such a system can proactively assist users in knowledge exploration leading to a more engaging dialog. The retrieval system is trained on a dataset called the Follow-up Query Bank (FQ-Bank). FQ-Bank contains ~14K multi-turn information-seeking conversations with a valid follow-up question and a set of invalid candidates. The invalid candidates are generated to simulate various syntactic and semantic confounders such as paraphrases, partial entity match, irrelevant entity, and ASR errors. We use confounder specific techniques to simulate these negative examples on the OR-QuAC dataset. Then, we train ranking models on FQ-Bank and present results comparing supervised and unsupervised approaches. The results suggest that we can retrieve the valid follow-ups by ranking them in higher positions compared to confounders, but further knowledge grounding can improve ranking performance.FQ-Bank is publicly available at https://github.com/amazon-science/fq-bank.

2011

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Learning Sub-Word Units for Open Vocabulary Speech Recognition
Carolina Parada | Mark Dredze | Abhinav Sethy | Ariya Rastrow
Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies

2010

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Unsupervised Model Adaptation using Information-Theoretic Criterion
Ariya Rastrow | Frederick Jelinek | Abhinav Sethy | Bhuvana Ramabhadran
Human Language Technologies: The 2010 Annual Conference of the North American Chapter of the Association for Computational Linguistics

2009

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Fast decoding for open vocabulary spoken term detection
Bhuvana Ramabhadran | Abhinav Sethy | Jonathan Mamou | Brian Kingsbury | Upendra Chaudhari
Proceedings of Human Language Technologies: The 2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics, Companion Volume: Short Papers

2006

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Text data acquisition for domain-specific language models
Abhinav Sethy | Panayiotis G. Georgiou | Shrikanth Narayanan
Proceedings of the 2006 Conference on Empirical Methods in Natural Language Processing

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Selecting relevant text subsets from web-data for building topic specific language models
Abhinav Sethy | Panayiotis Georgiou | Shrikanth Narayanan
Proceedings of the Human Language Technology Conference of the NAACL, Companion Volume: Short Papers