Assertion: fort sill | /r/HasProperty | declared a national historic landmark
Facets:
value: in 1960
type: TEMPORAL
Source sentences:
text: Fort Sill was declared a National Historic Landmark in 1960.
text: Fort Sill is located in Lawton, Oklahoma and was declared a National Historic Landmark in 1960.
text: Fort Sill is located in Lawton, Oklahoma and was declared a National Historic Landmark in 1960.