REMOVE

1. books
2. authors
3. ink

WHAT

1. animals (1)
2. exterior views (1)
3. farming (activity or syst … (1)
4. fields (land) (1)
5. Ovis (genus) (1)
6. sheep farms (1)
7. silver gelatin (1)
8. Visual Works (hierarchy n … (1)

Less

WHO

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

WHEN

1. 1929 (1)
2. 1960 (1)
3. between 1929 - 1960 (1)