Assertion: aurora borealis | /r/AtLocation | polar regions
Facets:
value: most commonly
type: DEGREE
Source sentences:
text: The Aurora Borealis is most commonly seen in the polar regions, within a radius of 1,550 miles around the magnetic poles.
text: The Aurora Borealis is most commonly seen in the polar regions, within a radius of 2,500 km around the magnetic poles.