Assertion: blue whale's length | /r/HasProperty | average
Facets:
Source sentences:
text: Blue whales can classified into three types, which are: Northern blue whales and Southern blue whales (both characteristic are same) and Pygymy blue whales, which their average length is about 24 m. Pygmy blue whales is another type of blue whales which first identified in 1966.
text: Their average length is about 70 to 90 feet.