REMOVE

1. rock
2. trucks
3. tools
4. railroads

WHAT

1. branches (plant component … (1)
2. buildings (structures) (1)
3. campuses (1)
4. colleges (buildings) (1)
5. color film (film) (1)
6. courtyards (1)
7. doors (1)
8. exterior views (1)
9. fountains (1)
10. geometric patterns (1)
11. reflections (perceived pr … (1)
12. shadows (1)
13. signs (declatory or adver … (1)
14. soil (1)
15. sunlight (1)
16. tile (materials) (1)
17. trees (1)
18. Visual Works (hierarchy n … (1)
19. windows (1)

Less

WHERE

1. San Francisco, California (1)

WHO

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

WHEN

1. 1970 (1)
2. ca. 1970 (1)