REMOVE

1. authors
2. hills
3. boats
4. black-and-white film

WHAT

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

More 

WHERE

1. Grand Coulee, Washington (1)
2. Westminster, Maryland (1)

WHO

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

WHEN

1. 1936 (1)
2. 1937 (1)
3. 1975 (1)
4. ca. 1936 - 1937 (1)

Less