REMOVE

1. sky
2. windows
3. shadows
4. automobiles
5. plants
6. roads
7. stools (seating furniture)

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)