Energies can be observed.Logical formLearned from21 sentences. A level can be constituted-of-or-filled-with (energy efficiency).Logical formLearned from21 sentences. (Energy challenges) can be long-term.Logical formLearned from21 sentences. (Energy alternatives) can be viable.Logical formLearned from21 sentences. Research can be into (alternative energy).Logical formLearned from21 sentences. An (energy consumption) can be in a country.Logical formLearned from21 sentences. (Energy needs) can be short-term.Logical formLearned from21 sentences. (Energy prices) may move.Logical formLearned from21 sentences. An (energy supply) can be safe.Logical formLearned from21 sentences. An increase can be in (energy expenditure).Logical formLearned from21 sentences. Energy can be harmonic.Logical formLearned from21 sentences. A (wave energy) can be high.Logical formLearned from21 sentences. Energy can be for cooking.Logical formLearned from21 sentences. Energy can be in a US-city.Logical formLearned from21 sentences. Electrical energy may undergo a use.Logical formLearned from21 sentences.