A third of sharks may face extinction.Logical formLearned from12 sentences. A (shark sanctuary) may pertain-to the world.Logical formLearned from11 sentences. Sharks can be in a country.Logical formLearned from11 sentences. Schools can be constituted-of-or-filled-with sharks.Logical formLearned from11 sentences. Sharks can be captive.Logical formLearned from11 sentences. An (union player) can be for sharks.Logical formLearned from11 sentences. Sharks can be tropical.Logical formLearned from11 sentences. Sharks can be in exchange.Logical formLearned from11 sentences. An affiliate may pertain-to sharks.Logical formLearned from11 sentences. A season can be with sharks.Logical formLearned from11 sentences. Sharks can be harmless.Logical formLearned from11 sentences. A shark can be slender.Logical formLearned from11 sentences. Some seasons can be with sharks.Logical formLearned from11 sentences. A (shark attack file) may list some attacks.Logical formLearned from11 sentences. A shark may be seen.Logical formLearned from11 sentences.