About: challenger disaster

Premodifier: challenger
Head noun: disaster

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

Broader concepts

label	provenance	confidence
case	isap:377222620	0.550056
problem	isap:343036981	0.512304
tragedy	isap:344339124	0.484452
time	isap:380244031	0.283358

Narrower concepts

label	provenance	confidence