REMOVE

1. trains (vehicle groupings)
2. figures (representations)
3. railroads (infrastructure)
4. 1930-1931

WHAT

1. Visual works (hierarchy n … (1)
2. oil paint (paint) (1)
3. railroad stations (1)
4. railroad yards (1)

WHERE

1. Killam, Alberta, Canada (1)

WHO

1. Still, Clyfford (1)

WHEN

1. 1930 (1)
2. 1931 (1)
3. Regionalist (American Sce … (1)