If there is a yellow smart car with a plow blade on the front
return smart car ;return #1 that is yellow ;return plow blade ;return front of #2 ;return #3 that is on #4 ;return #2 that has #5 ;return number of  #6 ;return if  #7 is at least one
['select', 'filter', 'select', 'project', 'filter', 'filter', 'aggregate', 'boolean']