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dc motor (subgroup of motor) → ReceivesAction → powered	0.60
dc motor (subgroup of motor) → HasProperty → efficient	0.59
dc motor (subgroup of motor) → HasA → commutator	0.40
dc motor (subgroup of motor) → ReceivesAction → classified into two types	0.38
dc motor (subgroup of motor) → CapableOf → convert electrical energy	0.35
dc motor (subgroup of motor) → CapableOf → drive on either direction	0.25
dc motor (subgroup of motor) → HasA → two terminals	0.25
stepper motor (subgroup of motor) → IsA → a dc motor	0.25
dc motor (subgroup of motor) → HasProperty → expensive	0.16