A coelacanth can be extinct.Logical formLearned from3 sentences. Sight can be extinct.Logical formLearned from3 sentences. (Passenger pigeons) can be extinct.Logical formLearned from3 sentences. Humankind may go extinct.Logical formLearned from3 sentences. Opposite birds can be extinct.Logical formLearned from3 sentences. A noble family can be extinct.Logical formLearned from3 sentences. A majority of species may go extinct.Logical formLearned from3 sentences. Moas can be extinct.Logical formLearned from3 sentences. Thousands of species may go extinct.Logical formLearned from3 sentences. Themselves may go extinct.Logical formLearned from3 sentences. A wildlife may go extinct.Logical formLearned from3 sentences. A rift can be extinct.Logical formLearned from3 sentences. Erectus may go extinct.Logical formLearned from3 sentences. Megafaunas may go extinct.Logical formLearned from3 sentences. Magnificens can be extinct.Logical formLearned from3 sentences.