About: railroad spike

Premodifier: railroad
Head noun: spike

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

Broader concepts

label	provenance	confidence
material	isap:295202472	0.565449
item	isap:195422337	0.506164
product	isap:228578668	0.469417

Narrower concepts

label	provenance	confidence