REMOVE

1. trees
2. rock
3. coastlines
4. sky
5. Still, Clyfford

WHAT

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

More 

WHERE

1. Alberta, Canada (1)

WHO

1. Clyfford Still; Still, Cl … (1)

WHEN

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