Assertion: national park's mile | /r/HasProperty | 24 km
Facets:
Source sentences:
text: A fifteen-mile (24 km) round trip path leads from this center to a two-story observation tower.
text: The park contains 15 miles (24 km) of beaches, as well as sand dunes, bogs, marshes, swamps, fens, prairies, rivers, oak savannas, and woodland forests.
text: The Grand Canyon, carved by the mighty Colorado River, is 277 miles (446 km) long, up to 1 mile (1.6 km) deep, and up to 15 miles (24 km) wide.