How many more wins did the Texans have in their AFC South title season over the previous season?
return the  Texans ;return wins of #1 ;return #2 in  their AFC South title season  ;return #2 in  the  season  previous to their AFC South title season ;return number of  #3 ;return number of  #4 ;return the  difference of #5 and  #6
['select', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']