A hill may double as an (aircraft shelter).Logical formLearned from2 sentences. A price may double in weeks.Logical formLearned from2 sentences. Values may be doubled.Logical formLearned from2 sentences. A tsar may double a size of a kingdom.Logical formLearned from2 sentences. A track may double.Logical formLearned from2 sentences. A person may be doubled for a male.Logical formLearned from2 sentences. A (career high) may double ranking.Logical formLearned from2 sentences. Sentences may be doubled.Logical formLearned from2 sentences. An addition may double a size of a library.Logical formLearned from2 sentences. Lungs may double as gills.Logical formLearned from2 sentences. An one may double money.Logical formLearned from2 sentences. Enigma may double.Logical formLearned from2 sentences. A population may double in years.Logical formLearned from2 sentences. A number of (rugby players) may be doubled.Logical formLearned from2 sentences. Matches may double.Logical formLearned from2 sentences.