REMOVE

1. shadows
2. libraries (buildings)
3. bushes
4. fences
5. arcades (structural assembli …
6. bushes

WHAT

1. Visual Works (hierarchy n … (1)
2. artists (visual artists) (1)
3. barriers (1)
4. benches (furniture) (1)

More 

WHERE

1. New York, New York (1)

WHEN

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