Descendants can be extinct.Logical formLearned from3 sentences. A common ancestor can be extinct.Logical formLearned from3 sentences. Camels can be extinct.Logical formLearned from3 sentences. Tribes can be extinct.Logical formLearned from3 sentences. An elk can be extinct.Logical formLearned from3 sentences. An organism can be extinct.Logical formLearned from3 sentences. Giant (ground sloths) can be extinct.Logical formLearned from3 sentences. Theropods can be extinct.Logical formLearned from3 sentences. Taxas can be extinct.Logical formLearned from3 sentences. Human ancestors can be extinct.Logical formLearned from3 sentences. A landscape can be extinct.Logical formLearned from3 sentences. Bison may go extinct.Logical formLearned from3 sentences. Species may go extinct.Logical formLearned from3 sentences. A virus may go extinct.Logical formLearned from3 sentences. A tree may go extinct.Logical formLearned from3 sentences.