Maintenance can be expensive.Logical formLearned from18 sentences. Tires can be expensive.Logical formLearned from18 sentences. Lenses can be expensive.Logical formLearned from18 sentences. A clothing can be expensive.Logical formLearned from18 sentences. Bags can be expensive.Logical formLearned from18 sentences. Watches can be expensive.Logical formLearned from18 sentences. Wheelchairs can be expensive.Logical formLearned from18 sentences. Seats can be expensive.Logical formLearned from18 sentences. Fertilizer can be expensive.Logical formLearned from18 sentences. Pieces can be expensive.Logical formLearned from18 sentences. A deity can be expensive.Logical formLearned from18 sentences. Wheat can be expensive.Logical formLearned from18 sentences. A stock may look expensive.Logical formLearned from18 sentences. (Insurance policies) can be expensive.Logical formLearned from18 sentences. A loan can be expensive.Logical formLearned from18 sentences.