Assertion list for term "build their shells".

Results from Ascent++: 6
mussel CapableOfbuild their shells 0.32
plankton CapableOfbuild their shells 0.30
crab CapableOfbuild their shells 0.28
organism CapableOfbuild their shells 0.28
oyster CapableOfbuild their shells 0.24
chemical reaction CapableOfbuild their shells 0.22