Natural gas may undergo marketing.Logical formLearned from28 sentences. Build-ups can be constituted-of-or-filled-with (methane gas).Logical formLearned from28 sentences. A pipeline may carry gas.Logical formLearned from28 sentences. A pact can be on (greenhouse gas emissions).Logical formLearned from28 sentences. (Artillery shells) may be filled with (mustard gas).Logical formLearned from28 sentences. A (gas pipeline) may pertain-to a continental-region.Logical formLearned from27 sentences. An origin may pertain-to gas.Logical formLearned from27 sentences. (Gas producers) may pertain-to a country.Logical formLearned from27 sentences. R can be gas.Logical formLearned from27 sentences. Controls can be on (greenhouse gas emissions).Logical formLearned from27 sentences. Gas may undergo a generation.Logical formLearned from27 sentences. A us-state can be gas.Logical formLearned from27 sentences. Exposure can be to gas.Logical formLearned from27 sentences. A whiff can be constituted-of-or-filled-with gas.Logical formLearned from27 sentences. Persons may pull into a (gas station).Logical formLearned from27 sentences.