What color is the shiny ball behind the matte brown square?
return balls ;return #1 that  is  shiny ;return squares ;return #3 that  is  matte ;return #4 that  is  brown ;return #2 that  is  behind #5 ;return color of #6
['select', 'filter', 'select', 'filter', 'filter', 'filter', 'project']