Assertion: manhole cover | /r/MadeOf | concrete
Facets:
value: in some cases
type: TEMPORAL
value: typically
type: DEGREE
Source sentences:
text: Manhole Covers and Risers are typically made of Concrete but could be made of Plastic or Metal.
text: Manhole covers are made with different materials such as cast iron, ductile iron, concrete and in some cases, with glass reinforced plastic (GRP).