REMOVE

1. soil
2. portraits
3. sky
4. railroads

WHAT

1. buildings (structures) (1)
2. exterior views (1)
3. farms (1)
4. fences (site elements) (1)
5. fields (land) (1)
6. hats (1)
7. silver gelatin (1)
8. spouses (1)
9. trees (1)
10. Visual Works (hierarchy n … (1)
11. wire (1)
12. women (1)

Less

WHO

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

WHEN

1. 1930 (1)
2. 1930s (1)
3. 1939 (1)