Persons may receive letters.Logical formLearned from95 sentences. Letters can be famous.Logical formLearned from95 sentences. A letter can be unopened.Logical formLearned from95 sentences. Letters may indicate that something-is-the-case.Logical formLearned from95 sentences. Authors may pertain-to a letter.Logical formLearned from95 sentences. Signatories may pertain-to a letter.Logical formLearned from94 sentences. A letter may undergo a delivery.Logical formLearned from94 sentences. A letter can be to chief.Logical formLearned from94 sentences. A female may open a letter.Logical formLearned from94 sentences. Letters may pertain-to a weekday.Logical formLearned from94 sentences. Letters can be daily.Logical formLearned from94 sentences. A person may have letters.Logical formLearned from94 sentences. A stack can be constituted-of-or-filled-with letters.Logical formLearned from94 sentences. A letter can be to leader.Logical formLearned from94 sentences. Letters can be urgent.Logical formLearned from93 sentences.