REMOVE

1. trees
2. artists (visual artists)
3. sitting
4. rock
5. moustaches
6. plants

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)