Assertion: whale's offspring | /r/HasProperty | single
Facets:
Source sentences:
text: On average a female whale will bear a single offspring once every 2 – 6 years while it is fertile.
text: During reproduction cycles female whales will bear a single offspring once every 2
text: From what little is known about the blue whales mating habits it is thought that the female whale gives birth to a single offspring once every 2
text: Female sei whales bare a single offspring once