Show the manager name with most number of gas stations opened after 2000.
SELECT manager_name FROM gas_station WHERE open_year  >  2000 GROUP BY manager_name ORDER BY count(*) DESC LIMIT 1
SELECT manager_name FROM gas_station WHERE open_year  >  2000 GROUP BY manager_name ORDER BY count(*) DESC LIMIT 1
[{'Manager_Name': 'Colin Denman'}]