question: Which event happened first, the United states emabrgoed iron and steel against Japan or an aviation gasoline ban against the Japanese was made?
#1 return the  United states emabrgoed iron and  steel against  Japan 
#2 return an aviation gasoline ban against  the  Japanese was  made 
#3 return when  was  #1 
#4 return when  was  #2 
#5 return which is lowest of #3 ,  #4