What is the first name and country code of the player with the most 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']