REMOVE

1. hills
2. barns
3. farmhouses
4. silhouettes
5. wells (structures)
6. after 1961

WHAT

1. Visual Works (hierarchy n … (1)
2. artists (visual artists) (1)
3. backdrops (1)
4. beards (1)
5. black-and-white film (1)

More 

WHERE

1. Westminster, Maryland (1)

WHO

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

WHEN

1. 1973 (1)