If the combined images contain exactly two yellow balls and no more than three white balls.
return combined images ;return balls  of #1 ;return #2 that are yellow ;return #2 that are white ;return the  number of  #3 ;return the  number of  #4 ;return if  #5 is equal to  two ;return if  #6 is at most three ;return if  both  #7 and #8 is true
['select', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'boolean', 'boolean', 'boolean']