Assertion: semitrailer | /r/HasProperty | tractor-trailers
Facets:
Source sentences:
text: In North America, the combination vehicles made up of a powered semi-tractor and one or more semitrailers are known as "semis", "semitrailers", "tractor-trailers", "big rigs", "semi-trucks", "eighteen-wheelers" or "semi-tractor-trailers".