REMOVE

1. tunnels
2. Alberta, Canada
3. Still, Clyfford

WHAT

1. Visual Works (hierarchy n … (1)
2. exterior views (1)
3. landscapes (representatio … (1)
4. mountains (1)
5. roads (1)

WHERE

1. Pacific Northwest (1)

WHO

1. Clyfford Still; Still, Cl … (1)

WHEN

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