Demand can be for fossil fuels.Logical formLearned from102 sentences. A fuel can be contaminated.Logical formLearned from102 sentences. Spent fuel may undergo a disposal.Logical formLearned from101 sentences. A (fuel economy) can be decent.Logical formLearned from101 sentences. A process may produce some fuel.Logical formLearned from101 sentences. A (center fuel tank) may pertain-to a plane.Logical formLearned from101 sentences. A fuel may be burnt.Logical formLearned from100 sentences. Spent fuel may undergo a management.Logical formLearned from99 sentences. A (fuel economy) can be constituted-of-or-filled-with some miles.Logical formLearned from98 sentences. Fossil fuels may undergo a production.Logical formLearned from98 sentences. (Fuel prices) may go_up.Logical formLearned from98 sentences. A fuel can be gaseous.Logical formLearned from98 sentences. Enrichment may make fuel.Logical formLearned from98 sentences. Fuels can be other.Logical formLearned from97 sentences. A fuel may be injected.Logical formLearned from97 sentences.