Families can be extinct.Logical formLearned from6 sentences. Remains can be constituted-of-or-filled-with extinct animals.Logical formLearned from6 sentences. Volcanic craters can be extinct.Logical formLearned from6 sentences. A reef can be extinct.Logical formLearned from6 sentences. Some cirripedes can be extinct.Logical formLearned from6 sentences. A multitude of groups can be extinct.Logical formLearned from6 sentences. Beings can be extinct.Logical formLearned from6 sentences. Varieties can be extinct.Logical formLearned from6 sentences. A man can be extinct.Logical formLearned from6 sentences. A whale can be extinct.Logical formLearned from6 sentences. Wildlife can be extinct.Logical formLearned from6 sentences. Deer can be extinct.Logical formLearned from6 sentences. An one can be extinct.Logical formLearned from6 sentences. Okapi can be extinct.Logical formLearned from6 sentences. A moment can be extinct.Logical formLearned from6 sentences.