(Opera performers) may pertain-to a world-city.Logical formLearned from9 sentences. (Opera houses) can be in a world-city.Logical formLearned from9 sentences. A male may be casted in a (soap opera).Logical formLearned from9 sentences. An overture may pertain-to an opera.Logical formLearned from9 sentences. A male may appear in operas.Logical formLearned from9 sentences. Works may include operas.Logical formLearned from9 sentences. A female can be on a (daytime soap opera).Logical formLearned from9 sentences. A tradition can be constituted-of-or-filled-with opera.Logical formLearned from9 sentences. A person may make an (opera debut).Logical formLearned from9 sentences. Performances can be in opera.Logical formLearned from9 sentences. A brother can be (opera singer).Logical formLearned from9 sentences. (Opera singers) can be retired.Logical formLearned from9 sentences. A male can be an italian composer of operas.Logical formLearned from9 sentences. An opera can be urban.Logical formLearned from9 sentences. A male can be at an opera.Logical formLearned from9 sentences.