An individual can be a subject of an investigation.Logical formLearned from21 sentences. Some investigations may be initiated.Logical formLearned from21 sentences. (Air quality investigations) can be indoor.Logical formLearned from21 sentences. Citizens may undergo investigations.Logical formLearned from21 sentences. Concerns may undergo an investigation.Logical formLearned from21 sentences. A person may oversee investigations.Logical formLearned from21 sentences. A mystery may undergo an investigation.Logical formLearned from21 sentences. An investigation can be into ways.Logical formLearned from21 sentences. A commission may conduct an investigation.Logical formLearned from21 sentences. Students may conduct investigations.Logical formLearned from21 sentences. Dreams may undergo an investigation.Logical formLearned from21 sentences. An investigation can be into use.Logical formLearned from21 sentences. An investigation can be supposed.Logical formLearned from21 sentences. (Background investigation) may indicate that something-is-the-case.Logical formLearned from21 sentences. An investigation may be politicised.Logical formLearned from21 sentences.