Publication Details
IDIAPers @ Causal News Corpus 2022: Extracting Cause-Effect-Signal Triplets via Pre-trained Autoregressive Language Model
Smrž Pavel, doc. RNDr., Ph.D. (DCGM)
Motlíček Petr, doc. Ing., Ph.D. (DCGM)
Burdisso Sergio
causal event extraction, causal event, cause, effect, signal, newsmedia
In this paper, we describe our shared task submissions for Subtask 2 in CASE-2022, Event Causality Identification with Casual News Corpus. The challenge focused on the automatic detection of all cause-effect-signal spans present in the sentence from news-media. We detect cause-effect-signal spans in a sentence using T5 --- a pre-trained autoregressive language model. We iteratively identify all cause-effect-signal span triplets, always conditioning the prediction of the next triplet on the previously predicted ones. To predict the triplet itself, we consider different causal relationships such as cause->effect->signal. Each triplet component is generated via a language model conditioned on the sentence, the previous parts of the current triplet, and previously predicted triplets. Despite training on an extremely small dataset of 160 samples, our approach achieved competitive performance, being placed second in the competition. Furthermore, we show that assuming either cause->effect or effect->cause order achieves similar results.
@inproceedings{BUT185126,
author="Martin {Fajčík} and Pavel {Smrž} and Petr {Motlíček} and Sergio {Burdisso}",
title="IDIAPers @ Causal News Corpus 2022: Extracting Cause-Effect-Signal Triplets via Pre-trained Autoregressive Language Model",
booktitle="Proceedings of the 5th Workshop on Challenges and Applications of Automated Extraction of Socio-political Events from Text (CASE 2022)",
year="2022",
pages="70--78",
publisher="Association for Computational Linguistics",
address="Abu Dhabi",
doi="10.18653/v1/2022.case-1.10",
isbn="978-1-959429-05-0",
url="https://aclanthology.org/2022.case-1.10/"
}