Assertion: abalone's shell | /r/HasProperty | flat
Facets:
value: with coarse surface
type: OTHER
value: quite
type: DEGREE
Source sentences:
text: The shell is oval in shape and quite flat.
text: Their shells are flat and thin with coarse surface.
text: It is more difficult for a highly rounded shell to stay attacked to a rocky surface-strong current habitat so the abalone usually forms a flat shell that presents a low profile to the currents.