What is the customer id, first and last name with least number of accounts.
return customers ;return accounts of #1 ;return number of #2 for each #1 ;return #1 where #3 is  lowest ;return customer 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']