REMOVE

1. sidewalks
2. shadows
3. sky
4. houses
5. automobiles
6. stairs
7. lamps (lighting devices)

WHAT

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

More 

WHERE

1. New Windsor, Maryland (1)

WHEN

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