A singer can be for some years.Logical formLearned from15 sentences. A fame can be as a singer.Logical formLearned from15 sentences. A male may join a roster of singers.Logical formLearned from15 sentences. A singer may be based in a country.Logical formLearned from15 sentences. An appearance can be by singer.Logical formLearned from15 sentences. A male can be a member of singers.Logical formLearned from15 sentences. A grandfather can be a singer.Logical formLearned from15 sentences. A career can be as an (opera singer).Logical formLearned from15 sentences. A singer can be perfect.Logical formLearned from15 sentences. An accompanist may pertain-to a singer.Logical formLearned from15 sentences. A male may portray a singer.Logical formLearned from15 sentences. A singer may take part.Logical formLearned from15 sentences. Singers can be in a world-city.Logical formLearned from15 sentences. Singers may pertain-to an era.Logical formLearned from15 sentences. A chamber may pertain-to a singer.Logical formLearned from15 sentences.