What are the first names of the different drivers who won in position 1 as driver standing and had more than 20 points?
return drivers ;return #1 who  won in  position 1 ;return #2 as driver standing ;return points of #3 ;return #3 where #4 is higher than 20 ;return different #5 ;return first names of #6
['select', 'filter', 'filter', 'project', 'comparative', 'project', 'project']