Sharks may kill (reef sharks).Logical formLearned from4 sentences. A diver can be in a (shark cage).Logical formLearned from4 sentences. Sharks can be nasty.Logical formLearned from4 sentences. An effect can be on sharks.Logical formLearned from4 sentences. A shark can be in a tank.Logical formLearned from4 sentences. Sharks may rule.Logical formLearned from4 sentences. An (exhibition opener) can be against sharks.Logical formLearned from4 sentences. A shark can be refined.Logical formLearned from4 sentences. Sharks can be alive.Logical formLearned from4 sentences. (Shark populations) can be deep-sea.Logical formLearned from4 sentences. Sharks can be vulnerable.Logical formLearned from4 sentences. A government may come_down on a side of sharks.Logical formLearned from4 sentences. A (shark tooth) can be fossil.Logical formLearned from4 sentences. Sharks may swim over a head.Logical formLearned from4 sentences. A shark may mature.Logical formLearned from4 sentences.