Assertion: dugong's lip | /r/HasProperty | flexible
Facets:
Source sentences:
text: Dugongs rip up the entire seagrass plant using their upper lip, which is flexible, and when they graze, they leave unique furrows on the seagrass bed that are visible from the surface.
text: The facial design of this creature is very intriguing, and one of the unique features is that they have an upper lip that is split and flexible.