A reference can be formal.Logical formLearned from43 sentences. A formal letter can be constituted-of-or-filled-with protest.Logical formLearned from43 sentences. A (peace conference) can be formal.Logical formLearned from43 sentences. An (oxidation state) can be formal.Logical formLearned from42 sentences. A higher education can be formal.Logical formLearned from42 sentences. (Court proceedings) can be formal.Logical formLearned from42 sentences. Appearances can be formal.Logical formLearned from42 sentences. A citizenship can be formal.Logical formLearned from42 sentences. Music can be formal.Logical formLearned from42 sentences. A feeling can be formal.Logical formLearned from42 sentences. Gold can be formal.Logical formLearned from42 sentences. A (negotiating session) can be formal.Logical formLearned from42 sentences. Circumstances can be formal.Logical formLearned from42 sentences. An exam can be formal.Logical formLearned from42 sentences. Trousers can be formal.Logical formLearned from42 sentences.