Task: Question Generation
Input (English): #1 return the  2nd Squadron ,  the 10th Cavalry ,   and  the 7th Infantry Division participate in  Exercise Reforger 
#2 return years of #1 
#3 return number of  #2
Output (English): How many years did the 2nd Squadron, the10th Cavalry, with the 7th Infantry Division participate in Exercise Reforger?