Assertion: humpback whale's calf | /r/HasProperty | born at 23 ft
Facets:
value: for antarctic blue whales
type: TRANSITIVE-OBJECT
value: in length
type: OTHER
Source sentences:
text: For Antarctic blue whales, a single calf is born at 23 ft (7 m) in length and weighs 2.8-3 tons (2540–2722 kg).