An investigation may be instituted.Logical formLearned from15 sentences. An investigation may pertain-to a forest-service.Logical formLearned from15 sentences. Surfaces may undergo an investigation.Logical formLearned from15 sentences. An investigation can be into investments.Logical formLearned from15 sentences. Evidence can be in a criminal investigation.Logical formLearned from15 sentences. Headway can be in an investigation.Logical formLearned from15 sentences. An investigation can be in a continent.Logical formLearned from15 sentences. Investigations can be drawn-out.Logical formLearned from15 sentences. (Rig workers) may be conducted during an investigation.Logical formLearned from15 sentences. Investigations can be by some states.Logical formLearned from15 sentences. An investigation can be over allegations.Logical formLearned from15 sentences. An investigation may examine a swelling of a debt.Logical formLearned from15 sentences. A military-or-other-action-organization may lead an investigation.Logical formLearned from15 sentences. An investigation can be into a conflict.Logical formLearned from15 sentences. An investigation may be based in part.Logical formLearned from15 sentences.