Assertion: horseshoe crab | /r/HasProperty | pushed onto their backs
Facets:
value: by a predator
type: OTHER
value: by wave action
type: MANNER
Source sentences:
text: Despite its appearance, this long appendage is not a poisonous barb or stinger, but is used by horseshoe crabs strictly to flip themselves over, should they be pushed onto their backs by wave action or a predator .