Investigations may pertain-to a US-president.Logical formLearned from29 sentences. (Administration officials) may undergo investigations.Logical formLearned from29 sentences. Companies may undergo investigations.Logical formLearned from29 sentences. Investigations can be into practices.Logical formLearned from29 sentences. Investigations can be by state.Logical formLearned from29 sentences. (Gulf war illnesses) may undergo an investigation.Logical formLearned from29 sentences. An investigation of an incident can be under way.Logical formLearned from29 sentences. An investigation may last some months.Logical formLearned from29 sentences. A material may undergo an investigation.Logical formLearned from29 sentences. Investigations can be intrusive.Logical formLearned from29 sentences. Acts may undergo an investigation.Logical formLearned from29 sentences. Investigations can be remedial.Logical formLearned from29 sentences. A link may undergo an investigation.Logical formLearned from29 sentences. An (inspector general) may open an investigation.Logical formLearned from29 sentences. Charges can be in an investigation.Logical formLearned from29 sentences.