Soumya Sankar Ghosh

Also published as: Soumya Ghosh


pdf bib
Reliable Gradient-free and Likelihood-free Prompt Tuning
Maohao Shen | Soumya Ghosh | Prasanna Sattigeri | Subhro Das | Yuheng Bu | Gregory Wornell
Findings of the Association for Computational Linguistics: EACL 2023

Due to privacy or commercial constraints, large pre-trained language models (PLMs) are often offered as black-box APIs. Fine-tuning such models to downstream tasks is challenging because one can neither access the model’s internal representations nor propagate gradients through it. This paper addresses these challenges by developing techniques for adapting PLMs with only API access. Building on recent work on soft prompt tuning, we develop methods to tune the soft prompts without requiring gradient computation. Further, we develop extensions that in addition to not requiring gradients also do not need to access any internal representation of the PLM beyond the input embeddings. Moreover, instead of learning a single prompt, our methods learn a distribution over prompts allowing us to quantify predictive uncertainty. Ours is the first work to consider uncertainty in prompts when only having API access to the PLM. Finally, through extensive experiments, we carefully vet the proposed methods and find them competitive with (and sometimes even improving on) gradient-based approaches with full access to the PLM.


pdf bib
DiMLex-Bangla: A Lexicon of Bangla Discourse Connectives
Debopam Das | Manfred Stede | Soumya Sankar Ghosh | Lahari Chatterjee
Proceedings of the Twelfth Language Resources and Evaluation Conference

We present DiMLex-Bangla, a newly developed lexicon of discourse connectives in Bangla. The lexicon, upon completion of its first version, contains 123 Bangla connective entries, which are primarily compiled from the linguistic literature and translation of English discourse connectives. The lexicon compilation is later augmented by adding more connectives from a currently developed corpus, called the Bangla RST Discourse Treebank (Das and Stede, 2018). DiMLex-Bangla provides information on syntactic categories of Bangla connectives, their discourse semantics and non-connective uses (if any). It uses the format of the German connective lexicon DiMLex (Stede and Umbach, 1998), which provides a cross-linguistically applicable XML schema. The resource is the first of its kind in Bangla, and is freely available for use in studies on discourse structure and computational applications.


pdf bib
Syntax and Pragmatics of Conversation: A Case of Bangla
Samir Karmakar | Soumya Sankar Ghosh
Proceedings of the 13th International Conference on Natural Language Processing

pdf bib
Graph theoretic interpretation of Bangla traditional grammar
Samir Karmakar | Sayantani Banerjee | Soumya Ghosh
Proceedings of the 13th International Conference on Natural Language Processing


pdf bib
Roles of Nominals in Construing Meaning at the Level of Discourse
Soumya Sankar Ghosh | Samir Karmakar
Proceedings of the 11th International Conference on Natural Language Processing