REMOVE

1. black
2. 1946
3. 1947

WHAT

1. Visual works (hierarchy n … (2)
2. abstraction (2)
3. oil paint (2)
4. gray (1)

WHERE

1. San Francisco, California (2)

WHO

1. Still, Clyfford (2)

WHEN

1. between 1946 and 1947 (2)