A libretto may be based on a play.Logical formLearned from5 sentences. A libretto may pertain-to a philosopher.Logical formLearned from5 sentences. A libretto can be witty.Logical formLearned from5 sentences. A libretto may be sung.Logical formLearned from5 sentences. An (opera libretto) may pertain-to a female.Logical formLearned from5 sentences. A libretto can be literate.Logical formLearned from5 sentences. Operas can be with librettos.Logical formLearned from5 sentences. Tandem can be with a libretto.Logical formLearned from5 sentences. A libretto may pertain-to a woman.Logical formLearned from5 sentences. (Opera librettos) may undergo a collection.Logical formLearned from5 sentences. Librettos may pertain-to a composer.Logical formLearned from5 sentences. A libretto may pertain-to a man.Logical formLearned from5 sentences. A source may pertain-to a libretto.Logical formLearned from4 sentences. Librettos can be for operas.Logical formLearned from4 sentences. A libretto may be translated into a language by a male.Logical formLearned from4 sentences.