REMOVE

1. sidewalks
2. sky
3. colleges (buildings)
4. windows
5. 1950

WHAT

1. black-and-white film (1)
2. buildings (structures) (1)
3. campuses (1)
4. doors (1)
5. exterior views (1)
6. hills (1)
7. plants (1)
8. streets (1)
9. studios (work spaces) (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. 1946 (1)
2. between 1946 - 1950 (1)