A lesson can be successful.Logical formLearned from19 sentences. Lessons can be monthly.Logical formLearned from19 sentences. Lessons can be challenging.Logical formLearned from19 sentences. Lessons can be for a time.Logical formLearned from19 sentences. A lesson may pertain-to a report.Logical formLearned from19 sentences. A male may start a lesson.Logical formLearned from19 sentences. Lessons can be from a continent.Logical formLearned from19 sentences. Persons may share lessons.Logical formLearned from19 sentences. (Share lessons) may be learnt.Logical formLearned from19 sentences. A lesson of a day can be a man.Logical formLearned from19 sentences. A lesson of a day can be a mind of men.Logical formLearned from19 sentences. A lesson can be in a country.Logical formLearned from19 sentences. An isolation can be a lesson.Logical formLearned from19 sentences. Professor may create (math lessons).Logical formLearned from19 sentences. Lessons may pertain-to teachers.Logical formLearned from19 sentences.