About: ventilation duct

Premodifier: ventilation
Head noun: duct

Same concepts
http://dbpedia.org/resource/Duct_(flow)

Broader concepts

label	provenance	confidence
confine space	isap:94379546	0.736789
location	isap:460061801	0.726231
service	isap:1842444	0.569340
material	isap:461492987	0.556445
opening	isap:6458247	0.544957

Narrower concepts

label	provenance	confidence