Assertion: cuttlefish's structure | /r/HasProperty | internal
Facets:
Source sentences:
text: Cuttlefish possess an internal structure called the cuttlebone, which is porous and is made of aragonite.
text: Cuttlefish have an internal structure called a cuttlebone which is porous to provide the animal with buoyancy.
text: Cuttlefish possess an internal structure called the cuttlebone, which is porous and composed of calcium carbonate, to provide the cuttlefish with buoyancy.