Some (gas bombs) may be placed on (commuter trains).Logical formLearned from20 sentences. (Gas canisters) can be liquid.Logical formLearned from20 sentences. A drop can be in a price of natural gas.Logical formLearned from20 sentences. Disruptions can be to (gas supplies).Logical formLearned from20 sentences. Gas may be piped.Logical formLearned from20 sentences. Claims can be to (gas deposits).Logical formLearned from20 sentences. A (gas business) can be global.Logical formLearned from20 sentences. A (petroleum gas plant) can be liquefied.Logical formLearned from20 sentences. Some metric tons can be constituted-of-or-filled-with (mustard gas).Logical formLearned from20 sentences. Some persons may be injured by gas.Logical formLearned from20 sentences. A (gas dealer) may pertain-to a country.Logical formLearned from20 sentences. (Gas masks) may pertain-to a person.Logical formLearned from20 sentences. Inspectors may discover a (mustard gas precursor).Logical formLearned from20 sentences. (Gas stations) can be suburban.Logical formLearned from20 sentences. A (nerve gas attack) can be on subways.Logical formLearned from20 sentences.