How many more spectators were at Old Trafford in 1986 for the first test of the Kangaroo tour of Great Britain and France than the 1989 World Cup Challenege?
return the  Kangaroo tour of Great Britain and  France ;return the  first test of #1 ;return spectators at Old Trafford in  1986 of #2 ;return the  1989 World Cup Challenege ;return spectators of #4 ;return number of  #3 ;return number of  #5 ;return the  difference of #6 and  #7
['select', 'project', 'project', 'select', 'project', 'aggregate', 'aggregate', 'arithmetic']