About: piper alpha

Premodifier: piper
Head noun: alpha

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

Broader concepts

label	provenance	confidence
event	isap:365630815	0.531478
accident	isap:293969958	0.479731
oil	isap:324498230	0.254909

Narrower concepts

label	provenance	confidence