REMOVE

1. trees
2. rivers
3. shadows
4. eyeglasses
5. branches (plant components)
6. benches (furniture)

WHAT

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

More 

WHERE

1. New York, New York (1)

WHEN

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