What color is the tiny object that is in front of the big gray cube and behind the big gray ball? 
return the   big  gray cube ;return the   big  gray ball ;return objects ;return #3 that  are tiny ;return #4 that  are in front of #1 ;return #4 that  are behind #2 ;return #4 in both #5 and #6 ;return the   color of #7
['select', 'select', 'select', 'filter', 'filter', 'filter', 'intersection', 'project']