REMOVE

1. paper
2. art collections
3. 1972
4. 1999

WHAT

1. Visual works (hierarchy n … (2)
2. automobiles (2)
3. fences (2)
4. figures (2)
5. grain elevators (2)

More 

WHO

1. Still, Clyfford (2)

WHEN

1. 1923 (2)
2. 1933 (2)
3. circa 1923–33 (2)