Task: Question Generation
Input (English): #1 return top 1 % 
#2 return #1 in  2007 
#3 return after-tax income  of #2 
#4 return pre-tax income  of #2 
#5 return percentage points of #3 
#6 return percentage points of #4 
#7 return the  difference of #6 and  #5
Output (English): How many percentage points less after-tax income did the top 1% have than pre-tax income in 2007?