Assertion: built vault | /r/HasProperty | filled with cement
Facets:
value: in a liquid state
type: LOCATION
value: over the top of the coffins
type: LOCATION
Source sentences:
text: After the coffins (of Lincoln and his wife) were lowered into the vault, it was filled with cement nearly in a liquid state, which in a short time hardened as a solid mass of stone, more than four feet and a half in depth over the top of the coffins.