REMOVE

1. yards (areas)
2. silhouettes
3. sky
4. black-and-white film
5. pillars
6. automobiles

WHAT

1. Visual Works (hierarchy n … (1)
2. branches (plant component … (1)
3. clouds (1)

More 

WHERE

1. New Windsor, Maryland (1)

WHEN

1. 1966 (1)
2. after 1966 (1)