REMOVE

1. trees
2. buildings (structures)
3. plants
4. eyeglasses
5. rock
6. artists (visual artists)

WHAT

1. Visual Works (hierarchy n … (1)
2. benches (furniture) (1)
3. branches (plant component … (1)

More 

WHERE

1. New York, New York (1)

WHEN

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