Assertion: sea urchin's predator | /r/HasProperty | eleven-armed sea star
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Source sentences:
text: The most important predators are the eleven-armed sea star, Coscinasterias calamaria, the seven-armed prickly starfish, Astrostole scabra, and the spiny lobster, Jasus edwardsii (Andrew and MacDiarmid 1991, Barker 2007).