About: heavy labor

Premodifier: heavy
Head noun: labor

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

Broader concepts

label	provenance	confidence

Narrower concepts

label	provenance	confidence
plowing	isap:37931476	0.432993
mining	isap:118860808	0.426425
tree	isap:89940921	0.259920