Assertion: swan's egg | /r/HasProperty | incubated by the female
Facets:
value: for 6 months
type: TEMPORAL
value: for 35 to 40 days
type: TEMPORAL
Source sentences:
text: Females usually lay 4 to 8 eggs which are incubated by the female and male for 35 to 40 days.
text: The eggs are incubated by the female for 6 months.