Assertion: owl's number | /r/HasProperty | 2.4 per night
Facets:
Source sentences:
text: The mean number of prey deliveries when the young are 6-10 days old is 2.4 per night, 1.4 when they are 11-15 days old, 3.6 when they are 16-20 days old and 2.2 when they are 21-25 days old.