Task: Question Generation
Input (English): #1 return the  Red Army capturing Omsk 
#2 return the  retreat of the   eastern front by white armies 
#3 return when  was  #1 
#4 return when  was  #2 
#5 return which is lowest of #3 ,  #4
Output (English): What event happened first, the Red Army capturing Omsk, or the retreat of the eastern front by white armies?