An (opera singer) can be well-known.Logical formLearned from20 sentences. A director may pertain-to an (opera house).Logical formLearned from20 sentences. An action may pertain-to an opera.Logical formLearned from20 sentences. A name may pertain-to an opera.Logical formLearned from20 sentences. An opera can be revolutionary.Logical formLearned from20 sentences. A male may be knowned for an opera.Logical formLearned from20 sentences. An opera can be pastoral.Logical formLearned from20 sentences. Music can be from an opera.Logical formLearned from20 sentences. A grand opera can be in some acts.Logical formLearned from20 sentences. An opera may be composed.Logical formLearned from20 sentences. A title may pertain-to an opera.Logical formLearned from20 sentences. A male may write a first opera.Logical formLearned from20 sentences. An opera may pertain-to persons.Logical formLearned from20 sentences. An opera can be experimental.Logical formLearned from20 sentences. An (opera score) may pertain-to an article.Logical formLearned from20 sentences.