Assertion: nurse shark's fin | /r/HasAspect | upper lobe
Facets:
Source sentences:
text: The caudal fin has only an upper lobe, which contains a prominent ventral notch near the tip and is angled almost horizontally relative to the body.
text: The caudal fin has both, an upper lobe, and a lower lobe, that can be of different sizes and the shape depends of which species the shark is.