Table 3.

Example alignment between sentences and relationships via semantic annotation, and lexical and semantic features extracted from the alignment

Sentence		“Baritosis is pneumoconiosis caused by barium dust”.
Annotated Sentence		“Baritosis is pneumoconiosis caused by barium dust”.
		Baritosis_(disorder)		Barium_Dust_(substance)
SNOMED CT relationship		Baritosis_(disorder) | Causative_agent | Barium_Dust_(substance)
Semantic Features		left type		between-words		right type
		disorder		“is pneumoconiosis caused by”		organism
BoW	{is, pneumoconiosis, caused, by}
Word 2-grams	{is pneumoconiosis, pneumoconiosis caused, caused by}
Char. 3-grams	{is␣, s␣p, ␣pn, pne, neu, eum, umo, moc, oco, con, oni, nio, ios, osi, sis, is␣, s␣c, ␣ca, cau, aus, use, sed, ed␣, d␣b, ␣by}