Assertion: shark | /r/HasProperty | buoyant
Facets:
value: neutrally
type: DEGREE
value: because of their light weight cartilage skeletons
type: CAUSE
Source sentences:
text: Sharks stay buoyant because of their light weight cartilage skeletons.
text: Cartilaginous skeletons are lighter than bone and help sharks to remain neutrally buoyant (able to float without sinking or rising).