Neng Wan


2025

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UCSC at SemEval-2025 Task 8: Question Answering over Tabular Data
Neng Wan | Sicong Huang | Esha Ubale | Ian Lane
Proceedings of the 19th International Workshop on Semantic Evaluation (SemEval-2025)

Table question answering (Table QA) remains challenging due to the varied structures of tables and the complexity of queries, which often require specialized reasoning. We introduce a system that leverages large language models (LLMs) to generate executable code as an intermediate step for answering questions on tabular data. The methodology uniformly represents tables as dataframes and prompts an LLM to translate natural-language questions into code that can be executed on these tables. This approach addresses key challenges by handling diverse table formats, enhancing interpretability through code execution. Experimental results on the DataBench benchmarks demonstrate that the proposed code-then-execute approach achieves high accuracy. Moreover, by offloading computation to code execution, the system requires fewer LLM invocations, thereby improving efficiency. These findings highlight the effectiveness of an LLM-based coding approach for reliable, scalable, and interpretable Table QA.

2024

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UCSC NLP at SemEval-2024 Task 10: Emotion Discovery and Reasoning its Flip in Conversation (EDiReF)
Neng Wan | Steven Au | Esha Ubale | Decker Krogh
Proceedings of the 18th International Workshop on Semantic Evaluation (SemEval-2024)

We describe SemEval-2024 Task 10: EDiReF consisting of three sub-tasks involving emotion in conversation across Hinglish code-mixed and English datasets. Subtasks include classification of speaker emotion in multiparty conversations (Emotion Recognition in Conversation) and reasoning around shifts in speaker emotion state (Emotion Flip Reasoning). We deployed a BERT model for emotion recognition and two GRU-based models for emotion flip. Our model achieved F1 scores of 0.45, 0.79, and 0.68 for subtasks 1, 2, and 3, respectively.