REMOVE

1. sky
2. trains (vehicle groupings)
3. windows
4. houses

WHAT

1. black-and-white film (1)
2. branches (plant component … (1)
3. exterior views (1)
4. freight cars (1)
5. ladders (1)
6. plants (1)
7. railroads (1)
8. rails (transit system ele … (1)
9. roads (1)
10. scaffolds (1)
11. signs (declatory or adver … (1)
12. soil (1)
13. trees (1)
14. Visual Works (hierarchy n … (1)
15. wheels (components) (1)
16. wrecks (sites) (1)

WHERE

1. New Windsor, Maryland (1)

WHO

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

More 

WHEN

1. 1969 (1)