REMOVE

1. windows
2. buildings (structures)
3. stairs
4. 1970

WHAT

1. branches (plant component … (1)
2. campuses (1)
3. colleges (buildings) (1)
4. color film (film) (1)
5. exterior views (1)
6. lamps (lighting devices) (1)
7. shadows (1)
8. sky (1)
9. sunlight (1)
10. towers (building division … (1)
11. trees (1)
12. utility poles (1)
13. Visual Works (hierarchy n … (1)

WHERE

1. San Francisco, California (1)

WHO

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

WHEN

1. ca. 1970 (1)