REMOVE

1. shadows
2. bushes
3. artists (visual artists)
4. stairs
5. sitting
6. benches (furniture)

WHAT

1. Visual Works (hierarchy n … (1)
2. arcades (structural assem … (1)
3. barriers (1)

More 

WHERE

1. New York, New York (1)

WHEN

1. 1964 (1)
2. ca. 1964 (1)