Assertion: manhole cover's opening | /r/HasProperty | circular
Facets:
Source sentences:
text: Manhole covers are round because a round cover cannot fall through its circular opening.
text: A round manhole cover cannot fall through its circular opening, whereas a square manhole cover might fall in if it were inserted diagonally in the hole.
text: A round manhole cover cannot fall through its circular opening, whereas a square manhole cover could fall in if it were inserted diagonally in the hole.