Assertion: vault | /r/HasProperty | built
Facets:
value: underground
type: LOCATION
value: typically
type: DEGREE
Source sentences:
text: Vaults were typically built using reinforced concrete and solid metal sheeting to ensure durability and longevity of the shelter construction.
text: Some vaults were built according to a uniform design plan (like Vaults 8, 12, 13, and 15), while others had to be adapted to local geological features.
text: When vaults are built underground, the ground gives all the resistance required.