REMOVE

1. trees
2. plants
3. houses
4. beards
5. sky
6. barriers
7. artists (visual artists)

WHAT

1. Visual Works (hierarchy n … (1)
2. berets (1)

More 

WHERE

1. New Windsor, Maryland (1)

WHO

1. Campbell, Sandra L. Still (1)
2. Sandra L. Still Campbell; … (1)

WHEN

1. 1971 (1)