What are the cities that have a branch that opened in 2001 and a branch with more than 100 members?
return branches ;return #1 that  opened in 2001 ;return number of  members for each  #1 ;return #1 where #3 is  more than 100 ;return the  cities of  both #2 and  #4
['select', 'filter', 'group', 'comparative', 'intersection']