Assertion: whale's tail | /r/HasProperty | flat
Facets:
Source sentences:
text: Whales come in different sizes, but they all have smooth skin, flippers, and flat tails (called flukes) that propel them through the water.
text: Whales come in different sizes, but they all have smooth skin, flippers, and flat tails (called flukes) that propel them through the water.