About: robert zubrin

Premodifier: robert
Head noun: zubrin

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

Broader concepts

label	provenance	confidence
engineer	isap:100682720	0.457782
scientist	isap:422227643	0.456094
author	isap:386837019	0.350073

Narrower concepts

label	provenance	confidence