Among those engineers who have visited, which engineer makes the least number of visits? List the engineer id, first name and last name.
return engineers ;return #1 who  have  visited ;return number of visits for each #2 ;return #2 where #3 is  the least ;return engineer  id of #4 ;return first name  of #4 ;return last name  of #4 ;return #5 , #6 ,  #7
['select', 'filter', 'group', 'comparative', 'project', 'project', 'project', 'union']