Find the name and age of the visitor who bought the most tickets at once.
return visitors ;return tickets #1 bought at once ;return number of  #2 for each  #1 ;return #1 where #3 is  highest ;return name of  #4 ;return age of  #4 ;return #5 ,  #6
['select', 'project', 'group', 'superlative', 'project', 'project', 'union']