Find the first name and country code of the player who did the most number of tours.
return players ;return tours of  #1 ;return number of  #2 for each  #1 ;return #1 where #3 is  highest ;return first name of  #4 ;return country code of  #4 ;return #5 ,  #6
['select', 'project', 'group', 'superlative', 'project', 'project', 'union']