REMOVE

1. buildings (structures)
2. branches (plant components)
3. sky
4. hills

WHAT

1. automobiles (2)
2. banks (landforms) (2)
3. benches (furniture) (2)
4. black-and-white film (4)
5. boys (2)
6. brick (clay product) (2)
7. bushes (2)
8. children (2)
9. clouds (1)
10. coats (garments) (1)
11. concrete block (2)
12. exterior views (4)
13. farms (2)
14. fields (land) (4)
15. forests (plant communitie … (2)
16. freight cars (2)
17. garages (2)
18. hats (1)
19. landscapes (representatio … (3)
20. men (male humans) (2)
21. pipes (smoking equipment) (1)
22. plants (3)
23. railroads (2)
24. rails (transit system ele … (2)
25. roads (2)
26. rock (1)
27. rubbish (2)
28. sheds (storage structures … (1)
29. signs (declatory or adver … (2)
30. silhouettes (1)
31. soil (2)
32. sunlight (1)
33. trains (vehicle groupings … (2)
34. trees (4)
35. utility poles (2)
36. Visual Works (hierarchy n … (4)
37. wheels (components) (2)
38. windows (2)
39. wood products (1)
40. woods (plant communities) (1)
41. workers (2)
42. wrecks (sites) (1)
43. yards (areas) (2)

WHERE

1. New Windsor, Maryland (2)
2. Westminster, Maryland (2)

WHO

1. Campbell, Sandra L. Still (3)
2. Sandra L. Still Campbell; … (3)
3. Clyfford Still; Still, Cl … (2)
4. Still, Clyfford (2)

More 

WHEN

1. 1961 (2)
2. 1969 (2)
3. after 1961 (2)