REMOVE

1. horizon line
2. airplanes
3. group portraits
4. 1945

WHAT

1. Visual Works (hierarchy n … (1)
2. exterior views (1)
3. fields (land) (1)

WHERE

1. Killam, Alberta, Canada (1)
2. Spokane, Washington (1)

WHO

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

WHEN

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