Ties may undergo an investigation.Logical formLearned from21 sentences. Books may undergo an investigation.Logical formLearned from21 sentences. An investigation may manifest slowness.Logical formLearned from21 sentences. An investigation can be into bunglings of records.Logical formLearned from21 sentences. A government may demand an investigation.Logical formLearned from21 sentences. A safety-board may do an investigation.Logical formLearned from21 sentences. Concerns can be about an investigation.Logical formLearned from21 sentences. An investigation may pertain-to a lake.Logical formLearned from21 sentences. Investigations can be in a region.Logical formLearned from21 sentences. Massacres may undergo an investigation.Logical formLearned from21 sentences. An investigation can be into an office.Logical formLearned from21 sentences. A government may cooperate with an investigation.Logical formLearned from21 sentences. Perjury may undergo an investigation.Logical formLearned from21 sentences. A clash may undergo an investigation.Logical formLearned from21 sentences. An investigation can be into a kidnapping.Logical formLearned from21 sentences.