A libretto may be based on a story.Logical formLearned from3 sentences. A quality may pertain-to a libretto.Logical formLearned from3 sentences. A libretto may be preserved.Logical formLearned from3 sentences. A person may write librettos.Logical formLearned from3 sentences. A libretto may be based on a play of a name.Logical formLearned from3 sentences. An opera may be set to a libretto.Logical formLearned from3 sentences. A male may write over some librettos.Logical formLearned from3 sentences. A libretto may pertain-to a play.Logical formLearned from3 sentences. A libretto may be inspired by a play.Logical formLearned from3 sentences. A libretto may be based on a story of a male.Logical formLearned from3 sentences. A libretto can be short.Logical formLearned from3 sentences. A libretto can be by a collaborator.Logical formLearned from3 sentences. A libretto may serve as a basis.Logical formLearned from3 sentences. A male may set a libretto.Logical formLearned from3 sentences. Entertainment can be with a libretto.Logical formLearned from3 sentences.