Assertion: atlantic horseshoe crab | /r/CapableOf | use copper-based protein
Facets:
value: in its blood
type: LOCATION
value: to transport oxygen
type: PURPOSE
Source sentences:
text: The Atlantic horseshoe crab, Limulus polyphemus, uses copper-based protein called hemocyanin in its blood to transport oxygen, which affords it that baby-blue color.