Exploring the Feasibility of ChatGPT for Event Extraction
Paper · 2023 · Jun Gao, Huan Zhao, Changlong Yu et al.
Summary
The paper asks whether ChatGPT can perform event extraction from a prompt alone, without task-specific training data or fine-tuning. This matters because annotated event data is costly to produce. The authors focus on event detection (finding trigger words and assigning event types) on the ACE 2005 corpus. Their prompts contain a task description, definitions of the event types, and positive and negative demonstrations, and they ask for output as JSON. They compare ChatGPT with the fine-tuned systems Text2Event and EEQA, test which prompt components matter, and look at rare event types and texts containing multiple events. They also run a small usability study with human prompt writers. ChatGPT trails the supervised models consistently. In the long-tail and multi-event settings, it reaches only about half of EEQA's score. Its results also change a lot depending on how the prompt is phrased. The study is an early, cautionary data point for teams considering LLMs as a replacement for trained extractors on schema-heavy information extraction tasks.
Key points
- On 20 randomly sampled ACE05 test sentences (33 event types), ChatGPT scored 64.00 F1. Text2Event (T5-base) scored 75.76, Text2Event (T5-large) 77.42 and EEQA (BERT-base) 81.82. ChatGPT's main weakness was precision, because it tended to over-predict triggers.
- In the prompt ablation, removing the event type definitions cost 11.95 F1 and removing the positive example cost 6.17 F1. Removing the negative example actually improved results, possibly because the model treated it as a positive demonstration.
- ChatGPT almost always produced well-formed structured output: 20/20 samples with the full prompt and 19/20 in some ablated settings.
- In long-tail and complex (multi-event) scenarios, ChatGPT averaged only 51.04% of EEQA's performance. The paper reports 49.2% on low-frequency events and 56.7% on high-frequency events.
- In the usability test, four NLP-trained annotators each had five prompt attempts on 10 samples. Scores did not improve steadily across attempts and varied widely between prompt styles, from 26.92 to 66.67 F1.
Institutions
📚 Shelves 5The field of science this work belongs to (OpenAlex fields).Computer Science · 9,086 worksArtificial Intelligence · 8,889 worksArts and Humanities · 9,296 worksLanguage and Linguistics · 9,206 worksComputer Vision and Pattern Recognition · 1,282 works
🧭 Topics 1Research subjects and languages the work is about.Information extraction · 109 works
Cite
Cite as Jun Gao, Huan Zhao, Changlong Yu and Ruifeng Xu. 2023. Exploring the Feasibility of ChatGPT for Event Extraction. arXiv:2303.03836.
@misc{gao2023exploring,
title = {{Exploring the Feasibility of ChatGPT for Event Extraction}},
author = {Jun Gao, Huan Zhao, Changlong Yu and Ruifeng Xu},
year = {2023},
doi = {10.48550/arxiv.2303.03836},
eprint = {2303.03836},
archivePrefix = {arXiv},
url = {https://doi.org/10.48550/arxiv.2303.03836}
}References
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