(Monitoring investigation) can be into a death of a singer.Logical formLearned from21 sentences. Investigations can be into killings.Logical formLearned from21 sentences. An investigation can be part of an effort.Logical formLearned from21 sentences. An investigation may pertain-to a regulator.Logical formLearned from21 sentences. An investigation can be on track.Logical formLearned from21 sentences. An investigation can be by a national-commission.Logical formLearned from21 sentences. An investigation can be into intelligence.Logical formLearned from21 sentences. Investigations can be in a world-city.Logical formLearned from21 sentences. Persons may make investigations.Logical formLearned from21 sentences. An investigation can be into (intelligence failures).Logical formLearned from21 sentences. Police may conduct an investigation.Logical formLearned from21 sentences. An investigation can be into a fighting.Logical formLearned from21 sentences. An investigation can be into a fire.Logical formLearned from20 sentences. An investigation may uncover abuse.Logical formLearned from20 sentences. An investigation can be into an attempt.Logical formLearned from20 sentences.