A reptile can be extinct.Logical formLearned from40 sentences. A genera can be extinct.Logical formLearned from40 sentences. Others can be extinct.Logical formLearned from40 sentences. A type can be extinct.Logical formLearned from38 sentences. Polar bears can be extinct.Logical formLearned from36 sentences. A dynasty can be extinct.Logical formLearned from36 sentences. A title can be extinct.Logical formLearned from36 sentences. A superfamily can be extinct.Logical formLearned from35 sentences. Animals can be extinct.Logical formLearned from35 sentences. A volcano can be extinct.Logical formLearned from34 sentences. An (order multituberculata) can be extinct.Logical formLearned from34 sentences. Humanity can be extinct.Logical formLearned from34 sentences. A subspecies can be extinct.Logical formLearned from33 sentences. A person may go extinct.Logical formLearned from33 sentences. A branch can be extinct.Logical formLearned from32 sentences.