Assertion: fin whale's tail | /r/HasProperty | efficient
Facets:
value: at achieving forward thrust
type: MANNER
Source sentences:
text: Through experimentation by Lauder and Pierce, the tail of Spinosaurus was found to have eight times as much forward thrust as the tails of terrestrial theropods like Coelophysis and Allosaurus, as well as being twice as efficient at achieving forward thrust.