A singer may pertain-to a (rock band u2).Logical formLearned from21 sentences. A singer may undergo a departure.Logical formLearned from21 sentences. A singer can be gay.Logical formLearned from21 sentences. (Pop singers) can be well-known.Logical formLearned from21 sentences. A singer can be a father.Logical formLearned from21 sentences. A singer can be intelligent.Logical formLearned from21 sentences. A documentary can be about a singer.Logical formLearned from21 sentences. Paintings may pertain-to a singer.Logical formLearned from21 sentences. (Opera singers) may pertain-to the world.Logical formLearned from21 sentences. An impact may pertain-to a singer.Logical formLearned from21 sentences. A falsetto may pertain-to a singer.Logical formLearned from21 sentences. A character can be a singer.Logical formLearned from21 sentences. A singer can be longtime.Logical formLearned from21 sentences. A look can be at a singer.Logical formLearned from21 sentences. An (entertainment feature) can be on a singer.Logical formLearned from21 sentences.