REMOVE

1. soil
2. automobiles
3. rubbish
4. sidewalks
5. black-and-white film
6. artists (visual artists)

WHAT

1. Visual Works (hierarchy n … (1)
2. buildings (structures) (1)
3. color film (film) (1)
4. cranes (equipment) (1)
5. exterior views (1)

More 

WHERE

1. Westminster, Maryland (1)

WHEN

1. 1975 (1)