An agency may lead an investigation.Logical formLearned from16 sentences. An investigation can be into a cause of a stampede.Logical formLearned from16 sentences. A part may pertain-to a criminal investigation.Logical formLearned from16 sentences. A president can be aware of an investigation.Logical formLearned from16 sentences. An agency may cooperate with an investigation.Logical formLearned from16 sentences. Investigations can be into a company.Logical formLearned from16 sentences. A security-council may demand an investigation.Logical formLearned from16 sentences. A male may urge an investigation.Logical formLearned from16 sentences. Questions may arise during an investigation.Logical formLearned from16 sentences. An investigation can be by (law enforcement).Logical formLearned from16 sentences. An (aviation industry official) can be with knowledge of an investigation.Logical formLearned from16 sentences. A country may promise an investigation.Logical formLearned from16 sentences. A link can be to an investigation.Logical formLearned from16 sentences. A policeman may lead an investigation.Logical formLearned from16 sentences. A female may want an investigation.Logical formLearned from16 sentences.