Investigators may open an inquiry.Logical formLearned from25 sentences. Investigators may begin a search.Logical formLearned from25 sentences. Investigators may find a note.Logical formLearned from25 sentences. Investigators may continue work.Logical formLearned from25 sentences. Investigators may seek evidence.Logical formLearned from25 sentences. Investigators may pertain-to a postal-service.Logical formLearned from24 sentences. An investigator may conduct research.Logical formLearned from24 sentences. An investigator may obtain an informed consent of a subject.Logical formLearned from24 sentences. A group can be constituted-of-or-filled-with some investigators.Logical formLearned from24 sentences. Investigators can be from an university.Logical formLearned from24 sentences. Principal investigator may pertain-to a grant.Logical formLearned from24 sentences. A doctor can be (co-principal investigator).Logical formLearned from24 sentences. Investigators may interview some witnesses.Logical formLearned from24 sentences. Support can be for new investigators.Logical formLearned from24 sentences. Investigators may recover evidence.Logical formLearned from24 sentences.