How many more cases did Justice Kennedy decide on with the conservatives than with the liberals?
return Justice Kennedy ;return cases that #1 decide on ;return #2 with the  conservatives ;return #2 with the  liberals ;return number of  #3 ;return number of  #4 ;return difference of #5 and  #6
['select', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']