Worries can be over (oil prices).Logical formLearned from123 sentences. Control can be over oil.Logical formLearned from123 sentences. (Oil exports) can be vital.Logical formLearned from123 sentences. A share may pertain-to an (oil revenue).Logical formLearned from123 sentences. (Oil prices) may have an impact.Logical formLearned from122 sentences. A price of oil can be high.Logical formLearned from122 sentences. An (oil production) may pertain-to a nation.Logical formLearned from122 sentences. A vote can be on (oil drilling).Logical formLearned from122 sentences. Rises can be in (oil prices).Logical formLearned from122 sentences. (Oil prices) may recover.Logical formLearned from122 sentences. Oils can be organic.Logical formLearned from121 sentences. Stocks can be constituted-of-or-filled-with oil.Logical formLearned from121 sentences. Taxes can be on (oil companies).Logical formLearned from121 sentences. Pressure can be on (oil prices).Logical formLearned from121 sentences. An (oil tanker) may undergo a sinking.Logical formLearned from121 sentences.