Assertion: calendar's length | /r/HasProperty | fixed at 90 days
Facets:
value: in a non-leap year
type: TEMPORAL
value: for winter
type: TEMPORAL
Source sentences:
text: The length of the astronomical seasons varies between 89 and 93 days, while the length of the meteorological seasons is less variable and is fixed at 90 days for winter in a non-leap year (91 days in a leap year ), 92 days for spring and summer, and 91 days for fall.