A male may study opera.Logical formLearned from10 sentences. Head may pertain-to an opera.Logical formLearned from10 sentences. Roles may pertain-to opera.Logical formLearned from10 sentences. An opera can be heroic.Logical formLearned from10 sentences. Opera may be released.Logical formLearned from10 sentences. An opera may undergo a making.Logical formLearned from10 sentences. An opera can be lyrical.Logical formLearned from10 sentences. A first opera may be performed.Logical formLearned from10 sentences. An (opera season) may pertain-to a world-city.Logical formLearned from10 sentences. (Season tickets) can be to an opera.Logical formLearned from10 sentences. An opera may be produced.Logical formLearned from10 sentences. A master can be constituted-of-or-filled-with opera.Logical formLearned from10 sentences. A trio can be constituted-of-or-filled-with operas.Logical formLearned from10 sentences. A loss can be in the (opera world).Logical formLearned from10 sentences. An (opera house) may be designed by architect.Logical formLearned from10 sentences.