4.3 Extractive Summarization
cal procedures to diagnostic tests.
For each MEDLINE citation, our system gener-
Our extractor for interventions relies on
ates a short extractive summary consisting of three
MetaMap (Aronson, 2001), a program that au-
tomatically identifies entities corresponding to
elements: the main intervention (which is usu-
ally more specific than the cluster label); the ti-
scored using regular expression patterns (Lin,
tle of the abstract; and the top-scoring outcome
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