REMOVE

1. monuments
2. sitting
3. eyeglasses
4. barriers
5. black-and-white film
6. benches (furniture)

WHAT

1. Visual Works (hierarchy n … (1)
2. artists (visual artists) (1)

More 

WHERE

1. New York, New York (1)

WHO

1. Diane Still Knox; Diane K … (1)
2. Knox, Diane Still (1)

WHEN

1. 1958 (1)