A country may shut_off some (gas supplies) to a continent.Logical formLearned from21 sentences. A (transit route) can be for (gas exports).Logical formLearned from21 sentences. (Greenhouse gas emissions) may cause (climate change).Logical formLearned from21 sentences. Gas may undergo an application.Logical formLearned from21 sentences. A natural gas can be marketable.Logical formLearned from21 sentences. A (gas supply) can be stable.Logical formLearned from21 sentences. Barrels of (mustard gas) may dig_up at a (construction site).Logical formLearned from21 sentences. Gas can be sweet.Logical formLearned from21 sentences. A (gas network) may pertain-to a country.Logical formLearned from21 sentences. A (gas production) may pertain-to a country.Logical formLearned from21 sentences. An anniversary may pertain-to a (gas attack).Logical formLearned from21 sentences. (Natural gas reserve) can be proven.Logical formLearned from21 sentences. A (gas station) may be located.Logical formLearned from21 sentences. A (gas production) can be unconventional.Logical formLearned from21 sentences. Natural gas may undergo a pricing.Logical formLearned from21 sentences.