REMOVE

1. black-and-white film
2. fields (land)
3. trains (vehicle groupings)
4. 1920

WHAT

1. Visual Works (hierarchy n … (1)
2. buildings (structures) (1)
3. bushes (1)
4. exterior views (1)

More 

WHERE

1. Killam, Alberta, Canada (1)

WHO

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

WHEN

1. 1940 (1)
2. between 1920 - 1940 (1)