Assertion: drainage basin | /r/HasProperty | forest tundra
Facets:
Source sentences:
text: At the base of the delta lies the Gulf of Ob, which is some 500 miles (800 km) long and has a width reaching 50 miles (80 km); the gulf’s own catchment area (forest tundra and tundra proper) is more than 40,000 square miles (105,000 square km).