Assertion: tower | /r/HasProperty | clad
Facets:
value: in portland stone
type: LOCATION
value: in cornish granite
type: LOCATION
Source sentences:
text: More than 11,000 long tons (12,320 short tons; 11,177 t) of steel were used in the framework for the towers and walkways, which were then clad in Cornish granite and Portland stone, to protect the underlying steelwork.