Based on the relevance score, we can produce a full ranking of all the summaries in the corpus.
to (Brandow et al., 1995) who run 12 Boolean queries on a corpus of 21,000 documents and compare three types of documents (full documents, lead extracts, and ANES extracts), we measure retrieval performance under more than 300 conditions (by language, summary length, retrieval policy for 8 summarizers or baselines).