Assertion: mouse's litter | /r/HasProperty | produced
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: Gestation lasts 19 to 21 days, and each female of these prolific rodents can produce up to 14 litters per year (5 to 10 is usual); 5 or 6 young per litter is normal, although litters of up to 12 are sometimes produced.