If at least one train has a visibly sloped front with a band of solid color around the windshield.
return train ;return front of #1 ;return #1 where  #2 is visibly sloped ;return windshield of #3 ;return #3 where  #4 has a  band of solid color around ;return number of  #5 ;return if  #6 is at least one
['select', 'project', 'comparative', 'project', 'comparative', 'aggregate', 'boolean']