Assertion: locomotive's engine | /r/HasProperty | dangerous
Facets:
value: occasionally
type: DEGREE
Source sentences:
text: Steam-powered and electric cars outsold gasoline-powered cars in the US prior to the invention of the electric starter, since internal combustion cars relied on a hand crank to start the engine, which was difficult and occasionally dangerous to use, as improper cranking could cause a backfire capable of breaking the arm of the operator.