REMOVE

1. sky
2. rivers
3. soil
4. rock
5. mountains

WHAT

1. banks (landforms) (2)
2. barriers (1)
3. black-and-white film (2)
4. bridges (built works) (1)
5. buildings (structures) (2)
6. bushes (1)
7. construction equipment (2)
8. construction sites (2)
9. cranes (equipment) (2)
10. exterior views (1)
11. fences (1)
12. Grand Coulee Dam (dam) (2)
13. hills (2)
14. landscapes (representatio … (2)
15. machinery (2)
16. paths (1)
17. railroads (1)
18. rails (transit system ele … (1)
19. roads (1)
20. rubbish (2)
21. scaffolds (2)
22. sheds (storage structures … (2)
23. signs (declatory or adver … (1)
24. towers (single built work … (1)
25. trees (1)
26. trucks (1)
27. valleys (landforms) (1)
28. Visual Works (hierarchy n … (2)
29. wood products (1)

WHERE

1. Grand Coulee, Washington (2)

WHO

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

WHEN

1. 1936 (2)
2. 1937 (2)
3. ca. 1936 - 1937 (2)