(Gas prices) can be unleaded.Logical formLearned from15 sentences. A stake can be in a (gas monopoly).Logical formLearned from15 sentences. A job may pump gas.Logical formLearned from15 sentences. Exposure can be to (poison gas).Logical formLearned from15 sentences. A country may have an arsenal of (poison gas).Logical formLearned from15 sentences. A stake can be in a (gas field).Logical formLearned from15 sentences. A company may sell natural gas to utilities.Logical formLearned from15 sentences. A cloud can be constituted-of-or-filled-with (nerve gas).Logical formLearned from15 sentences. Some (nerve gas attack) can be on a (subway system).Logical formLearned from15 sentences. Clouds can be constituted-of-or-filled-with (nerve gas).Logical formLearned from15 sentences. A (gas producer) can be in a country.Logical formLearned from15 sentences. Natural gas may soar to a record.Logical formLearned from15 sentences. An (oil and gas company) may pertain-to a country.Logical formLearned from15 sentences. Natural gas may soar.Logical formLearned from15 sentences. A cult may stage a (poison gas attack).Logical formLearned from15 sentences.