Skip to main content
. 2016 Jul 20;2016:455–464.

Table 8.

Entity extraction base features descriptions

Feature Feature Description
UNIGRAM Unigram fcase-sensitive]
LEMMA Lemma (lower-cased)
PARTS-OF-SPEECH Parts of speech
LABELLED DEPENDENCY Label of the relation from the word to its head combined with the lemma of its head word
DEPENDENCY HEIGHT Height of a word in its dependency tree
UMLS CONCEPT {BIOEQ-tagged normalized name
UMLS SEMANTIC TYPE {BIOE}-tagged UMLS semantic type