A tree can be extinct.Logical formLearned from20 sentences. A line may go extinct.Logical formLearned from20 sentences. Trilobites can be extinct.Logical formLearned from20 sentences. Peerages can be extinct.Logical formLearned from20 sentences. A volcanic crater can be extinct.Logical formLearned from20 sentences. Polar bears may go extinct.Logical formLearned from20 sentences. Lineages can be extinct.Logical formLearned from20 sentences. Persons may establish extinct.Logical formLearned from20 sentences. Washington-parts of a law can be extinct.Logical formLearned from20 sentences. A (passenger pigeon) can be extinct.Logical formLearned from20 sentences. Cats can be extinct.Logical formLearned from20 sentences. A marquessate can be extinct.Logical formLearned from19 sentences. Humans may go extinct.Logical formLearned from19 sentences. A genus can be constituted-of-or-filled-with extinct mammal.Logical formLearned from19 sentences. Volcanoes can be extinct.Logical formLearned from19 sentences.