What is the name of the shape that is obscured behind the cube and also behind the sphere?
return the   cube ;return the   sphere ;return shapes ;return #3 that  are obscured behind #1 ;return #3 that  are obscured behind #2 ;return #3 in both #4 and #5 ;return the   name of #6
['select', 'select', 'select', 'filter', 'filter', 'intersection', 'project']