question: How many more tanks than aircraft were sold to Bahrain after the Gulf War?
#1 return tanks 
#2 return aircraft 
#3 return #1 that were sold to Bahrain 
#4 return #2 that were sold to Bahrain 
#5 return #3 after the  Gulf War 
#6 return #4 after the  Gulf War 
#7 return number of  #5 
#8 return number of  #6 
#9 return difference of #7 and  #8