Task: Question Generation
Input (English): #1 return the  opening  of the   Greek embassy  in  Kazakhstan 
#2 return the  opening  of the   Kazakhstan embassy  in  Athens 
#3 return year of #1 
#4 return year of #2 
#5 return difference of #3 and  #4
Output (English): How many years passed between the opening of the Greek embassy in Kazakhstan and the opening of the Kazakhstan embassy in Athens?