Assertion: locomotive's wheel | /r/HasProperty | located under the boiler
Facets:
Source sentences:
text: The system counts the number of lead wheels (non-powered, found at the head-end to negotiate curves), driving wheels (located directly under the boiler, providing all power and adhesion), and finally the trailing wheels (also non-powered these are located near the cab for support of the firebox and weight displacement), all of which are separated by dashes.