Assertion: nurse shark's diet | /r/HasProperty | crab
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Source sentences:
text: Diet includes crabs, shrimp, clams, octopus, bony fish (i.e. anchovies, herring), and cartilaginous fish (i.e. brown smooth-hound sharks [Mustelus henlei], guitarfish [Rhinobatos productus] and bat rays [Myliobatis californicus]).