REMOVE

1. hats
2. clouds
3. machinery
4. forests (plant communities)

WHAT

1. black-and-white film (1)
2. farmers (1)
3. farming (1)
4. farms (1)
5. fields (land) (1)
6. men (male humans) (1)
7. plants (1)
8. plows (agricultural equip … (1)
9. portraits (1)
10. sky (1)
11. soil (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)