Bonds may double in value.Logical formLearned from2 sentences. A US-city may double over some years.Logical formLearned from2 sentences. Persons may double (teacher pay).Logical formLearned from2 sentences. (Season ticket sales) may double.Logical formLearned from2 sentences. A company may double a size of a plant.Logical formLearned from2 sentences. Loans may be doubled.Logical formLearned from2 sentences. A share of world may double.Logical formLearned from2 sentences. A net income may be doubled.Logical formLearned from2 sentences. Values may double in some years.Logical formLearned from2 sentences. A community may double in size.Logical formLearned from2 sentences. An electric motor may double as a generator.Logical formLearned from2 sentences. Power may double some years.Logical formLearned from2 sentences. Microprocessors may double some years.Logical formLearned from2 sentences. A percentage of persons may double over a (time period).Logical formLearned from2 sentences. (Mail volume) may double.Logical formLearned from2 sentences.