REMOVE

1. campuses
2. railroads
3. streets
4. black-and-white film
5. rooftops
6. automobiles

WHAT

1. Visual Works (hierarchy n … (1)
2. combines (1)
3. farmers (1)
4. farming (1)

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WHERE

1. Bow Island, Alberta, Cana … (1)

WHO

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

WHEN

1. 1931 (1)
2. ca. 1931 (1)