What are the phone numbers and email addresses of all customers who have an outstanding balance of more than 2000?
return customers ;return outstanding balances of  #1 ;return #1 where #2 is  higher than 2000 ;return phone numbers of  #3 ;return email addresses of  #3 ;return #4 ,  #5
['select', 'project', 'comparative', 'project', 'project', 'union']