Assertion: mound | /r/HasProperty | designated as a national historic landmark
Facets:
value: on october
type: TEMPORAL
value: in 1964
type: TEMPORAL
Source sentences:
text: The mounds were designated as a National Historic Landmark in 1964.
text: The mound was added to the National Register of Historic Places on November 30, 1978, and designated as a National Historic Landmark on October 31, 2016.