Assertion: arboretum's acre | /r/HasProperty | 180 haof land
Facets:
Source sentences:
text: In 1927, the United States National Arboretum was established in Washington, D.C. on 440 acres (180 ha) of land; currently it receives over half a million annual visitors.
text: In 1927, the United States National Arboretum was established in Washington, D.C. on 440 acres (180 ha) of land; currently it receives over half a million annual visitors.