Task: Question Generation
Input (English): #1 return invoices 
#2 return 10 cheapest of  #1 
#3 return customers of  #2 
#4 return first names of  #3 
#5 return last names of  #3 
#6 return #4 ,  #5
Output (English): What are the first and last names of the customers with the 10 cheapest invoices?