A basis can be for a libretto.Logical formLearned from13 sentences. A male may write librettos.Logical formLearned from13 sentences. A (libretto system) can be electronic.Logical formLearned from13 sentences. Libretto may be advanced.Logical formLearned from13 sentences. A libretto can be implanted.Logical formLearned from13 sentences. An opera can be with a libretto.Logical formLearned from13 sentences. A male can be to a libretto.Logical formLearned from12 sentences. A libretto can be by scribe.Logical formLearned from12 sentences. A male may write some librettos.Logical formLearned from12 sentences. A libretto can be published.Logical formLearned from12 sentences. A composer may write a libretto.Logical formLearned from12 sentences. A libretto can be czech.Logical formLearned from11 sentences. An opera can be with a libretto.Logical formLearned from11 sentences. Librettos can be for operas.Logical formLearned from11 sentences. A libretto can be by a poet.Logical formLearned from10 sentences.