question_text: How many more residents were in Ungheni and Cahul than in Soroca and Orhei?
decomposition: return residents in  Ungheni ;return residents in  Cahul ;return residents in  Soroca ;return residents in  Orhei ;return number of  #1 ;return number of  #2 ;return number of  #3 ;return number of  #4 ;return sum of #5 and  #6 ;return sum of #7 and  #8 ;return difference of #9 and  #10