Races can be extinct.Logical formLearned from2 sentences. A way can be extinct.Logical formLearned from2 sentences. Billions can be extinct.Logical formLearned from2 sentences. Persons may prevent a race from extincting.Logical formLearned from2 sentences. Extinct mammals may belong to an order.Logical formLearned from2 sentences. Plesiadapiformes can be extinct.Logical formLearned from2 sentences. Albanerpetontids can be extinct.Logical formLearned from2 sentences. Extinct volcanoes can be on a line.Logical formLearned from2 sentences. A chain can be constituted-of-or-filled-with extinct volcanoes.Logical formLearned from2 sentences. A blackbuck can be extinct.Logical formLearned from2 sentences. (Seed plant groups) can be extinct.Logical formLearned from2 sentences. Some species can be constituted-of-or-filled-with extinct animals.Logical formLearned from2 sentences. (Dormouse species) can be extinct.Logical formLearned from2 sentences. Some vertebrates can be extinct.Logical formLearned from2 sentences. Some languages can be at risk of extincting.Logical formLearned from2 sentences.