We introduce a manually-created, multireference dataset for abstractive sentence and short paragraph compression. First, we examine the impact of single-and multi-sentence level editing operations on human compression quality as found in this corpus. We observe that substitution and rephrasing operations are more meaning preserving than other operations, and that compressing in context improves quality. Second, we systematically explore the correlations between automatic evaluation metrics and human judgments of meaning preservation and grammaticality in the compression task, and analyze the impact of the linguistic units used and precision versus recall measures on the quality of the metrics. Multi-reference evaluation metrics are shown to offer significant advantage over single reference-based metrics.
REF manually created a multi-reference dataset for sentence and short paragraph compression and studied the correlations between several automatic evaluation metrics and human judgment.
A Dataset and Evaluation Metrics for Abstractive Compression of Sentences and Short Paragraphs
EMNLP
Computer Science