Assertion: iron manhole cover | /r/HasProperty | heavy
Facets:
value: in order to keep them
type: PURPOSE
value: in weight
type: OTHER
Source sentences:
text: These Cast Iron Manhole Covers are heavy in weight in order to keep them in place even when traffic passes over them.
text: Cast iron manhole covers are preferred because they are heavy duty, strong, long lasting and are not dislodged easily.