question: Return the number of accounts that the customer with the first name Art and last name Turcotte has.
#1 return customers 
#2 return first names of #1 
#3 return last names of #1 
#4 return #1 where #2 is  Art 
#5 return #1 where #3 is  Turcotte 
#6 return accounts of both #4 and #5 
#7 return number of  #6