(Gas fields) may pertain-to a country.Logical formLearned from58 sentences. Presence may pertain-to gas.Logical formLearned from58 sentences. A surge can be in (gas prices).Logical formLearned from58 sentences. Gas may be sold.Logical formLearned from58 sentences. Natural gas may undergo an extraction.Logical formLearned from58 sentences. A (gas explosion) may pertain-to a weekday.Logical formLearned from58 sentences. Gas may undergo a shipment.Logical formLearned from58 sentences. A percent may pertain-to (gas needs).Logical formLearned from58 sentences. A (gas company) can be state-controlled.Logical formLearned from58 sentences. Gas may be turn_offed.Logical formLearned from58 sentences. The police may use gas.Logical formLearned from58 sentences. A (gas explosion) can be underground.Logical formLearned from58 sentences. A percent may pertain-to (gas needs).Logical formLearned from57 sentences. Gas can be hazardous.Logical formLearned from57 sentences. A planet can be (gas giant).Logical formLearned from57 sentences.