Assertion: sunspot's field | /r/CapableOf | change polarity
Facets:
value: with this period
type: TEMPORAL
Source sentences:
text: This period is also observed in most other solar activity and is linked to a variation in the solar magnetic field that changes polarity with this period.
text: This period is also observed in most other expressions of solar activity and is deeply linked to a variation in the solar magnetic field that changes polarity with this period, too.