REMOVE

1. buildings (structures)
2. trees
3. shadows
4. clouds
5. artists (visual artists)

WHAT

1. Visual Works (hierarchy n … (1)
2. automobiles (1)
3. branches (plant component … (1)
4. color film (film) (1)
5. fields (land) (1)

More 

WHERE

1. Westminster, Maryland (1)

WHEN

1. 1971 (1)
2. ca. 1971 (1)