REMOVE

1. trees
2. roads
3. sidewalks
4. hats
5. freight cars
6. buildings (structures)

WHAT

1. black-and-white film (2)
2. bushes (1)
3. exterior views (2)
4. farms (1)
5. fences (2)
6. fields (land) (1)
7. grain elevators (2)
8. horizon line (1)
9. houses (1)
10. landscapes (representatio … (2)
11. paths (1)
12. plants (2)
13. platforms (general) (1)
14. railroads (2)
15. rails (transit system ele … (1)
16. rock (1)
17. signs (declatory or adver … (1)
18. sky (2)
19. soil (1)
20. townscapes (representatio … (1)
21. trains (vehicle groupings … (2)
22. utility poles (2)
23. Visual Works (hierarchy n … (2)

WHERE

1. Killam, Alberta, Canada (2)

WHO

1. Clyfford Still; Still, Cl … (2)
2. Still, Clyfford (2)

WHEN

1. 1920 (2)
2. 1940 (2)
3. between 1920 - 1940 (2)