Tell me the first and last name of the student who has the most activities.
return students ;return activities of  #1 ;return number of  #2 for each  #1 ;return #1 where #3 is  highest ;return first name of  #4 ;return last name of  #4 ;return #5 ,  #6
['select', 'project', 'group', 'superlative', 'project', 'project', 'union']