REMOVE

1. manuscripts (document genre)
2. mathematics
3. art schools (institutions)
4. 1941

WHAT

1. Information Forms (hierar … (1)
2. ink (1)

WHERE

1. Pullman, Washington (1)

WHO

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

WHEN

1. 1933 (1)
2. 1933-1941 (1)