REMOVE

1. sunlight
2. backdrops
3. roads
4. woods (plant communities)
5. neckties

WHAT

1. buildings (structures) (1)
2. exterior views (2)
3. forests (plant communitie … (2)
4. landscapes (representatio … (2)
5. mountains (2)
6. railroad stations (1)
7. railroads (2)
8. silver gelatin (2)
9. sky (1)
10. trees (2)
11. utility poles (2)

WHERE

1. Alberta, Canada (1)
2. Lake Louise, Alberta, Can … (1)
3. Pacific Northwest (1)

WHO

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

WHEN

1. 1920 (2)
2. 1945 (2)
3. between circa 1929 and ci … (2)