REMOVE

1. clouds
2. rivers
3. roads
4. grain elevators

WHAT

1. black-and-white film (1)
2. combines (1)
3. farmers (1)
4. farming (1)
5. farms (1)
6. fences (1)
7. horizon line (1)
8. horses (animals) (1)
9. landscapes (representatio … (1)
10. machinery (1)
11. men (male humans) (1)
12. plants (1)
13. profiles (figures) (1)
14. rock (1)
15. sky (1)
16. Visual Works (hierarchy n … (1)
17. wheat (1)

Less

WHERE

1. Bow Island, Alberta, Cana … (1)

WHO

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

WHEN

1. 1931 (1)
2. ca. 1931 (1)