REMOVE

1. roads
2. railroads
3. sky
4. townscapes (representations)
5. 1920

WHAT

1. Visual Works (hierarchy n … (1)
2. buildings (structures) (1)
3. exterior views (1)
4. fences (1)
5. fields (land) (1)

More 

WHERE

1. Killam, Alberta, Canada (1)

WHO

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

WHEN

1. 1945 (1)
2. between c. 1929 and c. 19 … (1)