Task: Question Generation
Input (English): #1 return products 
#2 return #1 which are  'sesame 
#3 return characteristic type codes of  #1 
#4 return #3 which are  'Grade 
#5 return #1 of  both #4 and  #2 
#6 return names of  characteristics of #5
Output (English): What are the names of the characteristics of the product 'sesame' that have the characteristic type code 'Grade'?