REMOVE

1. waterfalls (natural bodies o …
2. sky
3. 1920
4. 1945

WHAT

1. buildings (structures) (1)
2. cliffs (1)
3. coastlines (1)
4. exterior views (1)
5. landscapes (representatio … (1)

WHERE

1. Alberta, Canada (1)

WHO

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

WHEN

1. between circa 1929 and ci … (1)