Assertion: tropical circle | /r/CapableOf | drift towards the equator
Facets:
value: approximately,
type: TEMPORAL
value: by 15 metres per year
type: TEMPORAL
Source sentences:
text: As a result, (approximately, and on average) the Tropical Circles are drifting towards the equator (and the Polar Circles towards the poles) by 15 metres per year, and the area of the Tropics is decreasing by 1,100 square kilometres (420 sq mi) per year.