An (air conditioning system) may undergo an investigation.Logical formLearned from18 sentences. Investigations can be angry.Logical formLearned from18 sentences. Investigations can be by a foreman.Logical formLearned from18 sentences. Federal prosecutors may conduct a criminal investigation.Logical formLearned from18 sentences. Authorities may begin an investigation.Logical formLearned from18 sentences. A model can be for investigations.Logical formLearned from18 sentences. Persons may do investigations.Logical formLearned from18 sentences. An investigation can be significant.Logical formLearned from18 sentences. Investigation may be made.Logical formLearned from18 sentences. A time can be during an investigation.Logical formLearned from18 sentences. A (police investigation) may show that something-is-the-case.Logical formLearned from18 sentences. A source can be close to an investigation.Logical formLearned from18 sentences. An investigation can be by independent counsel.Logical formLearned from18 sentences. A focus may pertain-to a criminal investigation.Logical formLearned from18 sentences. Parameters may pertain-to an investigation.Logical formLearned from18 sentences.