REMOVE

1. dogs (animals)
2. ink
3. studies
4. between 1923 and 1933

WHAT

1. Visual Works (hierarchy n … (1)
2. graphite pencils (1)

WHO

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

WHEN

1. 1923 (1)
2. 1936 (1)