Table 3.

Statistical features (marked with *) and knowledge-based (marked with †) features extracted for classifying sentences.

Feature
Position in the document (absolute, relative) *
Sentence length *
Number of punctuation marks *
Number of numeric numbers n > 10, n < 10 *
Word overlap with title *
Number of cue-words (P, I, O)†
Number of cue-verbs (P, I, O)†
MeSH semantic types
Number of (n = [0-9]+) †