REMOVE

1. buildings (structures)
2. sky
3. airplanes
4. Killam, Alberta, Canada

WHAT

1. Visual Works (hierarchy n … (1)
2. exterior views (1)
3. group portraits (1)

WHERE

1. Spokane, Washington (1)

WHO

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

WHEN

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