REMOVE

1. hills
2. automobiles
3. roads
4. rubbish
5. bushes
6. trains (vehicle groupings)

WHAT

1. Visual Works (hierarchy n … (1)
2. artists (visual artists) (1)
3. baseball (field sport) (1)
4. benches (furniture) (1)
5. black-and-white film (1)

More 

WHERE

1. New York, New York (1)

WHEN

1. 1957 (1)