Assertion: petrel's egg | /r/HasProperty | laid to mid-june
Facets:
value: from mid-may
type: TEMPORAL
value: at the end of the burrow
type: LOCATION
value: in a chamber
type: LOCATION
Source sentences:
text: The oval white egg is laid from mid-May to mid-June in a chamber at the end of the burrow and incubated for 51–54 days, each parent alternating between sitting on the nest and feeding at sea.