What is the name of the manager with the most gas stations that opened after 2000?
return managers ;return gas stations of #1 ;return #2 that  opened after 2000 ;return number of #3 for each #1 ;return #1 where #4 is  highest ;return name of #5
['select', 'project', 'filter', 'group', 'superlative', 'project']