REMOVE

1. rivers
2. trees
3. backdrops
4. girls
5. artists (visual artists)
6. buildings (structures)

WHAT

1. Visual Works (hierarchy n … (1)
2. branches (plant component … (1)
3. bushes (1)
4. color film (film) (1)

More 

WHERE

1. Westminster, Maryland (1)

WHEN

1. 1964 (1)
2. ca. 1964 (1)