If one of the homes has a flat roof and the other has angular roof lines.
return one home ;return roof of  #1 ;return other home ;return roof of  #3 ;return If #2 is  flat ;return If #4 has angular lines ;return If both  #5 and #6 are  true
['select', 'project', 'select', 'project', 'boolean', 'boolean', 'boolean']