REMOVE

1. automobiles
2. athletes
3. horses (animals)
4. plants
5. black-and-white film
6. barriers

WHAT

1. Visual Works (hierarchy n … (1)
2. atmospheric perspective (1)
3. barns (1)
4. buildings (structures) (1)

More 

WHERE

1. New Windsor, Maryland (1)

WHEN

1. 1967 (1)
2. ca. 1967 (1)