A key can be to freedom.Logical formLearned from38 sentences. Keys can be hidden.Logical formLearned from38 sentences. A key may pertain-to a piece.Logical formLearned from38 sentences. Keys can be to an office.Logical formLearned from38 sentences. Cooperation can be a key.Logical formLearned from38 sentences. Keys can be to implementation.Logical formLearned from38 sentences. A key can be to a strength.Logical formLearned from38 sentences. A key can be a word.Logical formLearned from38 sentences. A key can be short.Logical formLearned from37 sentences. A key can be to a program.Logical formLearned from37 sentences. A value may be associated with a key.Logical formLearned from37 sentences. A key may be changed.Logical formLearned from37 sentences. A key can be to recovery.Logical formLearned from37 sentences. A key can be to a building.Logical formLearned from37 sentences. A (cd key) may pertain-to a video-game.Logical formLearned from37 sentences.