A male may rewrote a libretto.Logical formLearned from2 sentences. A libretto can be good that something-is-the-case.Logical formLearned from2 sentences. A libretto may be based on a play.Logical formLearned from2 sentences. A piece may have a libretto.Logical formLearned from2 sentences. A libretto may undergo a completion.Logical formLearned from2 sentences. A libretto can be pun-free.Logical formLearned from2 sentences. A libretto may pertain-to a comic opera.Logical formLearned from2 sentences. A libretto can be altered.Logical formLearned from2 sentences. A libretto may be written/wrote by playwright.Logical formLearned from2 sentences. A source can be for a libretto.Logical formLearned from2 sentences. A libretto may be written/wrote by a female.Logical formLearned from2 sentences. A libretto may be took.Logical formLearned from2 sentences. A libretto may pertain-to a cantata.Logical formLearned from2 sentences. Libretto can be by composer.Logical formLearned from2 sentences. Librettos can be for musical theater.Logical formLearned from2 sentences.