If one image shows a leftward headed train, and the other shows a rightward angled train.
return one image ;return train  of #1 ;return if  #2 is leftward headed ;return other image ;return train  of #4 ;return if  #5 is rightward angled ;return if  both  #3 and #6 is true
['select', 'project', 'boolean', 'select', 'project', 'boolean', 'boolean']