Show id, first name and last name for all customers and the number of accounts.
return customers ;return ids of  #1 ;return first names of  #1 ;return last names of  #1 ;return accounts of  #1 ;return number of  #5 for each  #1 ;return #2 ,  #3 ,   #4 , #6
['select', 'project', 'project', 'project', 'project', 'group', 'union']