Assertion: glass mullion | /r/HasProperty | unprecedented
Facets:
Source sentences:
text: I. M. Pei used all-glass mullions in his design of JFK Airport's Terminal 6 (National Airlines Sundrome), unprecedented at the time.
text: I. M. Pei used all-glass mullions in his design of JFK Airport's Terminal 6 (National Airlines Sundrome), unprecedented at the time.