REMOVE

1. plants
2. rivers
3. backdrops
4. automobiles
5. eyeglasses
6. dogs (animals)

WHAT

1. Visual Works (hierarchy n … (1)
2. black-and-white film (1)
3. brick (clay product) (1)
4. buildings (structures) (1)
5. doors (1)

More 

WHERE

1. Westminster, Maryland (1)

WHEN

1. 1961 (1)
2. after 1961 (1)