REMOVE

1. trees
2. tools
3. hats
4. workers
5. freight cars

WHAT

1. black-and-white film (1)
2. hills (1)
3. landscapes (representatio … (1)
4. plants (1)
5. sky (1)
6. soil (1)
7. Visual Works (hierarchy n … (1)

WHERE

1. Killam, Alberta, Canada (1)

WHO

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

WHEN

1. 1920 (1)
2. 1931 (1)
3. between 1920 - 1931 (1)