About: national park system

Premodifier: national park
Head noun: system

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

Broader concepts

label	provenance	confidence
public land	isap:498212950	0.717937
conservation	isap:69698469	0.589916
land	isap:498212964	0.357243

Narrower concepts

label	provenance	confidence
great smoky mountains national	isap:484326426	0.712518
park	isap:309678657	0.422216