Task: Question Generation
Input (English): #1 return Tehran being seized by the  Russians 
#2 return the  march on Tehran by Persian Soviet Socialist 
#3 return when  was  #1 
#4 return when  was  #2 
#5 return which is the  lowest of #3 ,  #4
Output (English): what happen first Tehran being seized by the Russians or the march on Tehran by Persian Soviet Socialist