REMOVE

1. rubbish
2. sky
3. buildings (structures)
4. hills
5. fences

WHAT

1. banks (landforms) (1)
2. barriers (1)
3. black-and-white film (1)
4. bridges (built works) (1)
5. construction equipment (1)
6. construction sites (1)
7. cranes (equipment) (1)
8. Grand Coulee Dam (dam) (1)
9. landscapes (representatio … (1)
10. machinery (1)
11. mountains (1)
12. paths (1)
13. rivers (1)
14. roads (1)
15. rock (1)
16. scaffolds (1)
17. sheds (storage structures … (1)
18. soil (1)
19. valleys (landforms) (1)
20. Visual Works (hierarchy n … (1)
21. wood products (1)

WHERE

1. Grand Coulee, Washington (1)

WHO

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

WHEN

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