Assertion: blast furnace | /r/HasProperty | preserved
Facets:
Source sentences:
text: One blast furnace (U4) has been preserved, including cowper stoves.
text: One blast furnace has been preserved, a second one has been mostly dismantled, only the outer frame, the Cowper stoves and the lower portion of the furnace itself remain.
text: Two blast furnaces have been preserved.
text: Two blast furnaces have been preserved, including cowper stoves.
text: Two blast furnaces have been preserved, including cowper stoves.  
text: After closing, it became one of the first industrial sites (and the only blast furnace) in the U.S. to be preserved and restored for public use.