REMOVE

1. concrete block
2. silhouettes
3. plants
4. fields (land)
5. landscapes (representations)
6. bushes

WHAT

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

More 

WHERE

1. Westminster, Maryland (1)

WHEN

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