Papers › Aspect-Category-Opinion-Sentiment Quadruple Extraction with Implicit Aspects and Opinions
Aspect-Category-Opinion-Sentiment Quadruple Extraction with Implicit Aspects and Opinions
Hongjie Cai, Rui Xia, Jianfei Yu
Product reviews contain a large number of implicit aspects and implicit opinions. However, most of the existing studies in aspect-based sentiment analysis ignored this problem. In this work, we introduce a new task, named Aspect-Category-Opinion-Sentiment (ACOS) Quadruple Extraction, with the goal to extract all aspect-category-opinion-sentiment quadruples in a review sentence and provide full support for aspect-based sentiment analysis with implicit aspects and opinions. We furthermore construct two new datasets, Restaurant-ACOS and Laptop-ACOS, for this new task, both of which contain the annotations of not only aspect-category-opinion-sentiment quadruples but also implicit aspects and opinions. The former is an extension of the SemEval Restaurant dataset; the latter is a newly collected and annotated Laptop dataset, twice the size of the SemEval Laptop dataset. We finally benchmark the task with four baseline systems. Experiments demonstrate the feasibility of the new task and its effectiveness in extracting and describing implicit aspects and implicit opinions. The two datasets and source code of four systems are publicly released at \url{https://github.com/NUSTM/ACOS}.
Code
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Tasks
Datasets
Introduced by this paper, per the archive.
Results from the paper archive 2025-07-28
| Task | Dataset | Model | Metric | Value | Rank at snapshot | Leaderboard | Report |
|---|---|---|---|---|---|---|---|
| Aspect-Based Sentiment Analysis (ABSA) | ACOS | Extract-Classify | F1 (Laptop) | 36.42 | #6 of 9 | Archive leaderboard | report |
| Aspect-Based Sentiment Analysis (ABSA) | ACOS | Extract-Classify | F1 (Restaurant) | 43.77 | #6 of 9 | Archive leaderboard | report |
| Aspect-Category-Opinion-Sentiment Quadruple Extraction | Laptop-ACOS | Extract-Classify-ACOS | F1 | 35.8 | #1 of 2 | Archive leaderboard | report |
| Aspect-Category-Opinion-Sentiment Quadruple Extraction | Restaurant-ACOS | Extract-Classify-ACOS | F1 | 44.61 | #1 of 2 | Archive leaderboard | report |
Ranks are positions in the archive's leaderboards as they stood at the 2025-07-28 snapshot. Results published since then are not among these rows, so a rank here is not a current standing.
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