An exit can be guarded.Logical formLearned from2 sentences. A suitcase can be guarded.Logical formLearned from2 sentences. A plain can be guarded.Logical formLearned from2 sentences. (Invasion plans) can be guarded.Logical formLearned from2 sentences. Response can be guarded.Logical formLearned from2 sentences. Military secrets can be guarded.Logical formLearned from2 sentences. Copyrights can be guarded.Logical formLearned from2 sentences. A witness can be guarded.Logical formLearned from2 sentences. Repositories can be guarded.Logical formLearned from2 sentences. A (data center) can be guarded.Logical formLearned from2 sentences. A (search algorithm) can be guarded.Logical formLearned from2 sentences. Data can be guarded.Logical formLearned from2 sentences. A voice of a secretary can be guarded.Logical formLearned from2 sentences. (Floor openings) can be guarded.Logical formLearned from2 sentences. Moving parts can be guarded.Logical formLearned from2 sentences.