How many accounts does the customer with first name Art and last name Turcotte have?
return customers ;return first names of  #1 ;return #1 where  #2 is Art ;return last names of  #1 ;return #1 where  #4 is Turcotte ;return #1 of  both #3 and #5 ;return accounts of  #6 ;return number of  #7
['select', 'project', 'comparative', 'project', 'comparative', 'intersection', 'project', 'aggregate']