REMOVE

1. bushes
2. sidewalks
3. farmers
4. 1950
5. 1967

WHAT

1. black-and-white film (2)
2. fields (land) (2)
3. freight cars (2)
4. men (male humans) (2)
5. plants (2)
6. railroads (2)
7. rails (transit system ele … (2)
8. rock (2)
9. sky (2)
10. soil (2)
11. tools (2)
12. trains (vehicle groupings … (2)
13. trees (2)
14. trucks (2)
15. utility poles (2)
16. Visual Works (hierarchy n … (2)
17. wrecks (sites) (2)

Less

WHERE

1. New Windsor, Maryland (2)

WHO

1. Campbell, Sandra L. Still (2)
2. Clyfford Still; Still, Cl … (2)
3. Sandra L. Still Campbell; … (2)
4. Still, Clyfford (2)

More 

WHEN

1. 1969 (2)