REMOVE

1. sky
2. farms
3. portraits
4. rock
5. trees

WHAT

1. artists (visual artists) (1)
2. automobiles (1)
3. black-and-white film (2)
4. bushes (1)
5. coats (garments) (1)
6. daughters (1)
7. driveways (1)
8. fences (1)
9. fields (land) (2)
10. forests (plant communitie … (1)
11. license plates (1)
12. men (male humans) (1)
13. moustaches (1)
14. neckties (1)
15. plants (2)
16. reflections (perceived pr … (1)
17. sunlight (1)
18. utility poles (1)
19. Visual Works (hierarchy n … (2)
20. wheels (components) (1)
21. windows (1)
22. women (1)
23. yards (areas) (2)

WHERE

1. Westminster, Maryland (2)

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. 1963 (1)
2. 1966 (1)
3. ca. 1966 (1)