Assertion: basement | /r/HasProperty | b
Facets:
Source sentences:
text: "Basement" (B)
text: On some buildings, floors below ground floor are usually marked as basement (B) but some buildings also marked these floors as minus (-), for example; minus one (-1), minus two (-2) and so on.
text: Sometimes minus is used as a substitution to basement (B), lower ground (LG) or sub basement (SB).