REMOVE

1. paintings (visual works)
2. plates (illustrations)
3. Alberta, Canada
4. Buffalo, New York
5. 48 Cooper Square, New York, …
6. Westminster, Maryland

WHAT

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

More 

WHO

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

WHEN

1. 1964 (1)