How many of the balls are the same color as the cylinder on the right?
return balls ;return cylinder ;return #2 that is  on  the   right ;return color of #1 ;return color of #2 ;return #1 where #4 is  the   same as #5 ;return number of  #6
['select', 'select', 'filter', 'project', 'project', 'comparative', 'aggregate']