Assertion: petrel's egg | /r/HasProperty | incubated in turn
Facets:
value: for 41 to 55 days
type: TEMPORAL
value: by female
type: OTHER
value: by both birds
type: OTHER
value: by the male
type: OTHER
Source sentences:
text: A single egg is incubated in turn by the male and female, and the chick is raised by both parents.
text: A single white egg that weighs up to 6–7% of mother's body mass is laid, and is incubated in turns by both birds for 41 to 55 days.