Reservation can be about a libretto.Logical formLearned from2 sentences. A libretto may be adapted by a female.Logical formLearned from2 sentences. A libretto may be adapted.Logical formLearned from2 sentences. An (opera libretto) can be short.Logical formLearned from2 sentences. A libretto may be titled.Logical formLearned from2 sentences. A (language libretto) may pertain-to a language.Logical formLearned from2 sentences. A version may have a libretto.Logical formLearned from2 sentences. A libretto can be for a composer.Logical formLearned from2 sentences. A libretto may have a history.Logical formLearned from2 sentences. A male may work on a libretto.Logical formLearned from2 sentences. An opera may be based on a libretto.Logical formLearned from2 sentences. A libretto can be famous.Logical formLearned from2 sentences. An empress may write a libretto.Logical formLearned from2 sentences. Some opera can be with libretto.Logical formLearned from2 sentences. A libretto can be a story of love.Logical formLearned from2 sentences.