REMOVE

1. monuments
2. shadows
3. neckties
4. sitting
5. barriers
6. parks (recreation areas)

WHAT

1. automobiles (1)
2. banks (landforms) (1)
3. black-and-white film (1)
4. boys (1)
5. branches (plant component … (1)
6. brick (clay product) (1)
7. buildings (structures) (1)
8. bushes (1)
9. children (1)
10. coats (garments) (1)
11. exterior views (1)
12. fields (land) (1)
13. forests (plant communitie … (1)
14. freight cars (1)
15. garages (1)
16. hats (1)
17. hills (1)
18. men (male humans) (1)
19. pipes (smoking equipment) (1)
20. plants (1)
21. railroads (1)
22. rails (transit system ele … (1)
23. roads (1)
24. rubbish (1)
25. signs (declatory or adver … (1)
26. sky (1)
27. soil (1)
28. trains (vehicle groupings … (1)
29. trees (1)
30. utility poles (1)
31. Visual Works (hierarchy n … (1)
32. wheels (components) (1)
33. windows (1)
34. workers (1)
35. wrecks (sites) (1)

Less

WHERE

1. New Windsor, Maryland (1)

WHO

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

More 

WHEN

1. 1969 (1)