Assertion: dolphin's tail | /r/HasProperty | powerful
Facets:
Source sentences:
text: Bottlenose dolphin has short, stubby beak, curved mouth, sleek, conically-shaped body, curved dorsal fin, powerful tail and pointed flippers.
text: Now he has the answer: Bottlenose dolphins can produce the power they need to swim circles around whatever they wish by using their powerful tails, new experiments show.
text: Dolphins primarily propel themselves by using their powerful tails, which are laterally oriented in contrast to the tails of fish.