Polar bears can be in danger of extincting.Logical formLearned from23 sentences. A population may go extinct.Logical formLearned from23 sentences. A tribe can be extinct.Logical formLearned from23 sentences. A lineage can be extinct.Logical formLearned from23 sentences. A language can be extinct.Logical formLearned from22 sentences. An elephant can be extinct.Logical formLearned from22 sentences. A moa can be extinct.Logical formLearned from22 sentences. A creature can be extinct.Logical formLearned from22 sentences. A line can be extinct.Logical formLearned from22 sentences. Tigers can be extinct.Logical formLearned from22 sentences. An animal can be extinct.Logical formLearned from21 sentences. Populations can be extinct.Logical formLearned from21 sentences. Beings can be extinct.Logical formLearned from21 sentences. A crater can be extinct.Logical formLearned from21 sentences. A civilization can be extinct.Logical formLearned from20 sentences.