Assertion: zebra's foal | /r/HasProperty | single
Facets:
Source sentences:
text: After a gestation period of 365 days, Mountain Zebras give birth to a single foal.
text: After a gestation period of 370 days, Plains Zebra give birth to a single foal.
text: After a gestation period of 350 - 400 days, Grevy's Zebra give birth to a single foal.