REMOVE

1. Visual Works (hierarchy name …
2. Visual Works (hierarchy name …
3. machinery
4. between 1930 and 1940

WHAT

1. Visual Works (hierarchy n … (1)
2. studies (1)

WHO

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

WHEN

1. 1930 (1)
2. 1940 (1)