A (gas crisis) can be with a country.Logical formLearned from19 sentences. Forces may strafe villages with (poison gas).Logical formLearned from19 sentences. A country may sell gas.Logical formLearned from19 sentences. A world-city may steal gas.Logical formLearned from19 sentences. A (gas explosion) may rip through an (apartment building).Logical formLearned from19 sentences. A (gas conflict) can be with a country.Logical formLearned from19 sentences. A dispute may lead to an interruption of (gas supplies).Logical formLearned from19 sentences. (Gas emissions) may pertain-to a country.Logical formLearned from19 sentences. A (gas war) can be with a world-city.Logical formLearned from19 sentences. A (gas reserve) may pertain-to a country.Logical formLearned from19 sentences. A level can be constituted-of-or-filled-with gas.Logical formLearned from19 sentences. (Gas exports) can be to a continent.Logical formLearned from19 sentences. A (gas field) can be lucrative.Logical formLearned from19 sentences. (Gas pipeline) may undergo construction.Logical formLearned from19 sentences. Some tonnes can be constituted-of-or-filled-with (methyl isocyanate gas).Logical formLearned from19 sentences.