REMOVE

1. sidewalks
2. plants
3. rock
4. houses
5. fronts (architectural)
6. branches (plant components)

WHAT

1. Visual Works (hierarchy n … (1)
2. automobiles (1)
3. black-and-white film (1)
4. bushes (1)

More 

WHERE

1. New Windsor, Maryland (1)

WHEN

1. 1966 (1)
2. after 1966 (1)