A letter may conclude.Logical formLearned from215 sentences. An authenticity may pertain-to a letter.Logical formLearned from215 sentences. Letters may pertain-to a word.Logical formLearned from214 sentences. Letters may pertain-to a US-president.Logical formLearned from214 sentences. A letter can be sealed.Logical formLearned from214 sentences. A letter can be to a company.Logical formLearned from213 sentences. A letter may explain that something-is-the-case.Logical formLearned from213 sentences. A letter can be urgent.Logical formLearned from213 sentences. A letter may be readed.Logical formLearned from212 sentences. Letters may pertain-to a first name.Logical formLearned from211 sentences. A person may write letters.Logical formLearned from211 sentences. A letter can be from a man.Logical formLearned from210 sentences. A letter may pertain-to an agreement.Logical formLearned from210 sentences. A letter may pertain-to a doctor.Logical formLearned from210 sentences. Letters may pertain-to a religious-holiday.Logical formLearned from209 sentences.