REMOVE

1. sky
2. houses
3. bushes
4. trees
5. public sculpture
6. after 1966

WHAT

1. Visual Works (hierarchy n … (1)
2. automobiles (1)
3. branches (plant component … (1)
4. buildings (structures) (1)

More 

WHERE

1. New Windsor, Maryland (1)

WHEN

1. 1966 (1)