Show minimum and maximum amount of memberships for all branches opened in 2011 or located at city London.
return branches ;return #1 opened in 2011 ;return #1 located in London ;return #2 or  #3 ;return memberships of  #4 ;return number of  #5 for each  #1 ;return minimum of  #6 ;return maximum of  #6 ;return #7 ,  #8
['select', 'filter', 'filter', 'union', 'project', 'group', 'aggregate', 'aggregate', 'union']