Abstract

This paper investigates automatic query generation from legal decisions, along with contributing a test collection for the evaluation of case law retrieval. For a sentence or paragraph within a legal decision that cites another decision, queries were automatically generated from a proportion of the terms in that sentence or paragraph. Manually generated queries were also created as a ground to empirically compare automatic methods. Automatically generated queries were found to be more effective than the average Boolean queries from experts. However, the best keyword and Boolean queries from experts significantly outperformed automatic queries.

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