Assertion: locomotive | /r/HasProperty | unmanned
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Source sentences:
text: The incident was caused due to several incidents originating from the engineer's faults; the locomotive was unmanned due to the engineer being thrown off, and traveled at over 51mph hauling a train of toxic chemicals and was originally switching freight cars in a yard but was accidentally diverted onto a mainline after numerous issues caused by the engineer, who didn't have a crew to assist him and the train.