Assertion: leap year's month | /r/HasAspect | 29 or 30 days
Facets:
value: typically
type: TEMPORAL
value: because of this
type: OTHER
Source sentences:
text: Because of this, a regular month can have 29 or 30 days.
text: Since Greek months typically had 29 or 30 days, the extra day of 31-day months was named Sebaste—the emperor's day