About: chalk board

Premodifier: chalk
Head noun: board

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

Broader concepts

label	provenance	confidence
non-porous surface	isap:228179335	0.736992
material	isap:297678553	0.573275
great idea	isap:195822932	0.513037

Narrower concepts

label	provenance	confidence
counter	isap:32326955	0.267620
one	isap:470322962	0.231894
wall	isap:87956408	0.170673