Find the student ID and personal name of the student with at least two enrollments.
return students ;return enrollments of  #1 ;return number of #2 for each #1 ;return #1 where  #3 is  at least two ;return student ID of  #4 ;return personal name of  #4 ;return #5 ,   #6
['select', 'project', 'group', 'comparative', 'project', 'project', 'union']