REMOVE

1. sky
2. Visual Works (hierarchy name …
3. clouds
4. 1942

WHAT

1. black-and-white film (1)
2. farmers (1)
3. farming (1)

More 

WHERE

1. Bow Island, Alberta, Cana … (1)

WHO

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

WHEN

1. 1938 (1)
2. circa 1940 (1)