About: a b

Premodifier: a
Head noun: b

Same concepts
http://dbpedia.org/resource/AB

Broader concepts

label	provenance	confidence
united states	isap:53861746	0.704560
long time	isap:215587795	0.422445
b	isap:516172451	0.383471
c	isap:516175163	0.201948

Narrower concepts

label	provenance	confidence