Fuels can be expensive.Logical formLearned from30 sentences. Repairs can be expensive.Logical formLearned from30 sentences. Care can be expensive.Logical formLearned from30 sentences. Technologies can be expensive.Logical formLearned from30 sentences. A program can be expensive.Logical formLearned from30 sentences. A route can be expensive.Logical formLearned from29 sentences. Feed can be expensive.Logical formLearned from29 sentences. A paper can be expensive.Logical formLearned from29 sentences. A metal can be expensive.Logical formLearned from29 sentences. Units can be expensive.Logical formLearned from29 sentences. Airfare can be expensive.Logical formLearned from29 sentences. Security can be expensive.Logical formLearned from29 sentences. Proposals can be expensive.Logical formLearned from29 sentences. A process can be expensive.Logical formLearned from29 sentences. Techniques can be expensive.Logical formLearned from28 sentences.