A male can be (letter writer).Logical formLearned from39 sentences. A male may deliver a letter.Logical formLearned from39 sentences. A person may receive a letter from a female.Logical formLearned from39 sentences. Letters can be short.Logical formLearned from39 sentences. Letters can be from professors.Logical formLearned from39 sentences. A letter may be ignored.Logical formLearned from39 sentences. A letter can be from a hospital.Logical formLearned from39 sentences. Letters can be constituted-of-or-filled-with offer.Logical formLearned from39 sentences. A letter can be fake.Logical formLearned from39 sentences. A letter can be to parishioners.Logical formLearned from39 sentences. A letter may be discovered.Logical formLearned from39 sentences. A letter may test positive for anthrax.Logical formLearned from39 sentences. A letter can be from a US-city.Logical formLearned from39 sentences. (Block letters) can be red.Logical formLearned from39 sentences. A letter can be to directors.Logical formLearned from39 sentences.