REMOVE

1. rubbish
2. soil
3. roads
4. boys
5. hats
6. boats

WHAT

1. Visual Works (hierarchy n … (1)
2. automobiles (1)
3. black-and-white film (1)
4. farms (1)
5. fences (1)

More 

WHERE

1. Westminster, Maryland (1)

WHO

1. Campbell, Sandra L. Still (1)
2. Sandra L. Still Campbell; … (1)

WHEN

1. 1963 (1)