Assertion: drainage basin's tributary | /r/CapableOf | join the yukon
Facets:
value: at fort yukon
type: LOCATION
Source sentences:
text: The next large tributary, the Porcupine River, joins the Yukon at Fort Yukon, Alaska; the Porcupine drains the northern Yukon territory and the southeastern slope of the high and rugged Brooks Range in Alaska, a land occupied by a small population of Indians.