An opera can be a mash of joy.Logical formLearned from16 sentences. An opera can be a failure.Logical formLearned from16 sentences. A (title character) can be in a (rock opera).Logical formLearned from16 sentences. A scene may pertain-to an opera.Logical formLearned from16 sentences. Operas may pertain-to a US-city.Logical formLearned from16 sentences. (Opera performances) may pertain-to a world-city.Logical formLearned from16 sentences. An orchestra may pertain-to an opera.Logical formLearned from16 sentences. An opera can be high-tech.Logical formLearned from16 sentences. (Opera houses) can be in a continent.Logical formLearned from15 sentences. An opera can be sacred.Logical formLearned from15 sentences. A composer may be knowned for operas.Logical formLearned from15 sentences. An opera can be in some scenes.Logical formLearned from15 sentences. Operas can be full-scale.Logical formLearned from15 sentences. An (opera singer) can be international.Logical formLearned from15 sentences. A male can be an English opera.Logical formLearned from15 sentences.