REMOVE

1. horizon line
2. Spokane, Washington
3. Killam, Alberta, Canada

WHAT

1. Visual Works (hierarchy n … (1)
2. airplanes (1)
3. exterior views (1)
4. fields (land) (1)
5. group portraits (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)