Assertion: stairwell's floor | /r/HasProperty | affected by fire
Facets:
Source sentences:
text: Prior to the collapses, the owners of the towers, the Port Authority of New York and New Jersey, were in the process of adding fireproofing, but had only been completed on 18 floors in 1 WTC, including all the floors affected by the aircraft impact and fires, and on 13 floors in 2 WTC, although none were directly affected by the aircraft impact.