original: gramophone archive by age 15 , he had already given concerts worldwide .
simplifications: gramophone archive by age 15 , he had already given concerts all over the world . by the age of 15 , gramophone archive had already given concerts worldwide . gramophone archive by age 15 , he had already given concerts worldwide . by age 15 gramaphone archive already gave concerts worldwide . gramophone archive : he had given many concerts worldwide by the age of 15 . by age 15 , he had already given concerts worldwide . gramophone archive by age 15 , he had already given concerts around the world by age 15 , he had already given concerts around the world .