original: berlin and paris developed thriving émigré communities .
simplifications: berlin and paris created growing emigre communities . berlin and paris developed communities for persons who have been migrated out . berlin and paris developed thriving émigré communities . berlin and paris developed large communties of people from other countries . berlin and paris developed thriving émigré communities . berlin and paris developed thriving émigré communities . berlin and paris created large émigré communities . berlin and paris have a growing immigrant population .