REMOVE

1. rooftops
2. garages
3. sky
4. bushes
5. houses
6. churches (buildings)
7. 1967

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)