Which engineer has visited the most times? Show the engineer id, first name and last name.
return engineer  ;return times #1 visited ;return number of  #2 for each  #1 ;return #1 where #3 is  most ;return id of  #4 ;return first name  of  #4 ;return last name  of  #4 ;return #5 ,  #6 ,   #7
['select', 'project', 'group', 'superlative', 'project', 'project', 'project', 'union']