Assertion: great mound | /r/HasProperty | approximately 300 feet
Facets:
value: across
type: LOCATION
Source sentences:
text: The Great Mound is approximately 300 feet (91 m) across and consists of an outer embankment 9 feet (2.7 m) high and 63 feet (19 m) wide, surrounding a 60 feet (18 m) wide ditch that is 10.5 feet (3.2 m) deep.