REMOVE

1. soil
2. freight cars
3. wheels (components)
4. rock
5. railroads
6. ladders

WHAT

1. Visual Works (hierarchy n … (1)
2. artists (visual artists) (1)
3. branches (plant component … (1)
4. bushes (1)
5. color film (film) (1)

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WHERE

1. Westminster, Maryland (1)

WHEN

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