Assertion: horseshoe crab's book gill | /r/HasProperty | exposed
Facets:
Source sentences:
text: Horseshoe crabs also swim upside down, and use their exposed book gills for momentum
text: Horseshoe crabs also swim upside down, and use their exposed book gills for momentum
text: Horseshoe crabs also swim upside down, and use their exposed book gills for momentum