Assertion: national park's mile | /r/HasProperty | 80 km
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: During the formation of the Rocky Mountains 170 million years ago, one region of rocks now known as the Lewis Overthrust was forced eastward 50 miles (80 km).
text: The park has over 50 miles (80 km) of hiking trails.
text: The national park is located in southwestern Utah about 50 miles (80 km) northeast of and 1,000 feet (300 m) higher than Zion National Park.
text: In total there are 50 miles (80 km) of trails in the park.