If an orange truck has a plow on the front of it.
return truck ;return #1 that is orange ;return plow of #2 ;return #3 that is in  front of #2 ;return #2 that has #4 ;return number of  #5 ;return if  #6 is at least one
['select', 'filter', 'project', 'filter', 'filter', 'aggregate', 'boolean']