Assertion: manhole cover | /r/MadeOf | strong and heavy materials
Facets:
Source sentences:
text: Manhole covers tend to be made from these strong and heavy materials to help keep them in place as traffic passes over them, and to make them difficult for unauthorised people to lift without suitable tools.
text: Manhole covers tend to be made from these strong and heavy materials to help keep them in place as traffic passes over them, and to make them difficult for unauthorised people to lift without suitable tools.