Assertion: national park's area | /r/HasProperty | the park
Facets:
Source sentences:
text: While exploring the Marias River in 1806, the Lewis and Clark Expedition came within 50 miles (80 km) of the area that is now the park.
text: The shelter of the coulees and the abundance of game and berries made the area that is now the park an excellent location for these nomadic people to stop on their seasonal migrations.