If one image shows people riding the dogsled, the other does not.
return one image ;return people in  #1 ;return the  dogsled in  #1 ;return if  #2 are riding #3 ;return the  other image ;return people in  #5 ;return the  dogsled in  #5 ;return if  #6 are not riding #7 ;return if  both  #4 and #8 are true
['select', 'project', 'project', 'boolean', 'select', 'project', 'project', 'boolean', 'boolean']