About: train system

Premodifier: train
Head noun: system

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

Broader concepts

label	provenance	confidence

Narrower concepts

label	provenance	confidence
bay area rapid transit	isap:270336331	0.436518
amtrak	isap:398249750	0.341099
subway	isap:388676386	0.249961
train	isap:158855134	0.187450