Task: Question Generation
Input (English): #1 return the  Capella/Chorus tour Europe and  North America was  under the direction of Oleksandr Koshetz 
#2 return years of #1 
#3 return number of  #2
Output (English): How many years did the Capella/Chorus tour Europe and North America under the direction of Oleksandr Koshetz in total?