About: longwall mining

Premodifier: longwall
Head noun: mining

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

Broader concepts

label	provenance	confidence
underground mining method	isap:396582217	0.530580
method	isap:396582223	0.503261
technique	isap:421324217	0.439255

Narrower concepts

label	provenance	confidence