Assertion: barren ground caribou | /r/CapableOf | cover 1,000,000 km2
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Source sentences:
text: Some populations of the North American caribou, for example, many herds in the subspecies, the barren-ground caribou, and some woodland caribou in Ungava and Labrador, migrate the farthest of any terrestrial mammal, travelling up to 5,000 km (3,100 mi) a year, and covering 1,000,000 km2 (390,000 sq mi).