REMOVE

1. sky
2. fields (land)
3. automobiles
4. 1945
5. 1920

WHAT

1. boys (1)
2. exterior views (1)
3. farmers (1)
4. group portraits (1)
5. hills (1)
6. landscapes (representatio … (1)
7. men (male humans) (1)
8. platforms (general) (1)
9. silver gelatin (1)
10. trees (1)
11. Visual Works (hierarchy n … (1)

WHERE

1. Alberta, Canada (1)

WHO

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

WHEN

1. between circa 1929 and ci … (1)