REMOVE

1. forests (plant communities)
2. soil
3. farmers
4. machinery

WHAT

1. black-and-white film (1)
2. clouds (1)
3. farming (1)
4. farms (1)
5. fields (land) (1)
6. hats (1)
7. men (male humans) (1)
8. plants (1)
9. plows (agricultural equip … (1)
10. portraits (1)
11. sky (1)
12. tractors (agricultural eq … (1)
13. trees (1)
14. Visual Works (hierarchy n … (1)

WHERE

1. Bow Island, Alberta, Cana … (1)

WHO

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

WHEN

1. 1938 (1)
2. 1942 (1)
3. circa 1940 (1)