Vaibhav Singh
2026
TypeCoT at UZH Shared Task 2026: Reconstructing Argumentative Structure in UN Resolutions using Type-Informed Chain-of-Thought
Chandan Kumar R S | Vinay Babu Ulli | Jyoti Kumari | Vaibhav Singh
Proceedings of the 13th Workshop on Argument Mining and Reasoning
Chandan Kumar R S | Vinay Babu Ulli | Jyoti Kumari | Vaibhav Singh
Proceedings of the 13th Workshop on Argument Mining and Reasoning
United Nations and UNESCO resolutions encode complex collective reasoning through highly structured preambles and operative clauses. Reconstructing this implicit argumentative structure is a challenging natural language processing task. This paper describes our submission to the UZH Shared Task at the ArgMining Workshop 2026. Adhering to the strict constraint of using open-weight models with at most 8B parameters, we propose a highly efficient, modular pipeline built entirely upon the Qwen-2.5-7B-Instruct architecture. To address Subtask 1, we decouple the problem, employing a 4-bit quantized LoRA adapter via the Unsloth framework for paragraph type classification and a type-informed chain-of-thought approach for thematic tagging and relation prediction.
2025
ARISE: Iterative Rule Induction and Synthetic Data Generation for Text Classification
Yaswanth M | Vaibhav Singh | Ayush Maheshwari | Amrith Krishna | Ganesh Ramakrishnan
Findings of the Association for Computational Linguistics: NAACL 2025
Yaswanth M | Vaibhav Singh | Ayush Maheshwari | Amrith Krishna | Ganesh Ramakrishnan
Findings of the Association for Computational Linguistics: NAACL 2025
We propose ARISE, a framework that iteratively induces rules and generates synthetic data for text classification. We combine synthetic data generation and automatic rule induction, via bootstrapping, to iteratively filter the generated rules and data. We induce rules via inductive generalisation of syntactic-ngrams, enabling us to capture a complementary source of supervision. These rules alone lead to performance gains in both, in-context learning (ICL) and fine-tuning (FT) settings. Similarly, use of augmented data from ARISE alone improves the performance for a model, outperforming configurations that rely on complex methods like contrastive learning. Further, our extensive experiments on various datasets covering three full-shot, eight few-shot and seven multilingual variant settings demonstrate that the rules and data we generate lead to performance improvements across these diverse domains and languages.
RELIC: Enhancing Reward Model Generalization for Low-Resource Indic Languages with Few-Shot Examples
Soumya Suvra Ghosal | Vaibhav Singh | Akash Ghosh | Soumyabrata Pal | Subhadip Baidya | Sriparna Saha | Dinesh Manocha
Findings of the Association for Computational Linguistics: EMNLP 2025
Soumya Suvra Ghosal | Vaibhav Singh | Akash Ghosh | Soumyabrata Pal | Subhadip Baidya | Sriparna Saha | Dinesh Manocha
Findings of the Association for Computational Linguistics: EMNLP 2025
Reward models are essential for aligning large language models (LLMs) with human preferences. However, most open-source multilingual reward models are primarily trained on preference datasets in high-resource languages, resulting in unreliable reward signals for low-resource Indic languages. Collecting large-scale, high-quality preference data for these languages is prohibitively expensive, making preference-based training approaches impractical. To address this challenge, we propose RELIC, a novel in-context learning framework for reward modeling in low-resource Indic languages. RELIC trains a retriever with a pairwise ranking objective to select in-context examples from auxiliary high-resource languages that most effectively highlight the distinction between preferred and less-preferred responses. Extensive experiments on three preference datasets—PKU-SafeRLHF, WebGPT, and HH-RLHF—using state-of-the-art open-source reward models demonstrate that RELIC significantly improves reward model accuracy for low-resource Indic languages, consistently outperforming existing example selection methods. For example, on Bodo—a low-resource Indic language—using a LLaMA-3.2-3B reward model, RELIC achieves a 12.81% and 10.13% improvement in accuracy over zero-shot prompting and state-of-the-art example selection method, respectively