Assertion: blast furnace | /r/HasProperty | preserved including outer frames
Facets:
Source sentences:
text: Two blast furnaces have been preserved, including outer frames, furnaces and Cowper stoves.
text: One blast furnace has been preserved, including outer frame, furnace, cowper stoves and casthouse.
text: Six blast furnaces have been preserved, including outer frames, furnaces, Cowper stoves, and casthouses.