REMOVE

1. plants
2. boys
3. shadows
4. roads
5. artists (visual artists)
6. backdrops
7. bushes

WHAT

1. Visual Works (hierarchy n … (1)
2. barns (1)
3. black-and-white film (1)
4. buildings (structures) (1)
5. clouds (1)

More 

WHERE

1. Westminster, Maryland (1)

WHEN

1. 1961 (1)
2. after 1961 (1)