A (school system) can be formal.Logical formLearned from63 sentences. A (classroom setting) can be formal.Logical formLearned from63 sentences. A retraction can be formal.Logical formLearned from63 sentences. A campaigning can be formal.Logical formLearned from63 sentences. Balls can be formal.Logical formLearned from63 sentences. Guarantees can be formal.Logical formLearned from63 sentences. Literature can be formal.Logical formLearned from62 sentences. Political institutions can be formal.Logical formLearned from62 sentences. A (music education) can be formal.Logical formLearned from62 sentences. A capacity can be formal.Logical formLearned from62 sentences. Advertising can be formal.Logical formLearned from62 sentences. A register can be formal.Logical formLearned from62 sentences. An existence can be formal.Logical formLearned from61 sentences. An organization can be formal.Logical formLearned from61 sentences. (Education systems) can be formal.Logical formLearned from61 sentences.