Assertion: seal's pup | /r/HasProperty | single
Facets:
Source sentences:
text: The female southern elephant seal gives birth to a single pup.
text: Female elephant seals give birth to a single pup after an 11-month gestation.
text: They give birth to a single pup every year, with females' reproductive years beginning as early as 4 years old and extending up to 30 years of age.