REMOVE

1. plants
2. 1969
3. ca. 1936 - 1937
4. 1967

WHAT

1. art museums (2)
2. artists (visual artists) (2)
3. Information Forms (hierar … (2)
4. ink (2)
5. retrospectives (2)

WHERE

1. New York, New York (2)

WHO

1. Clyfford Still; Still, Cl … (2)
2. Ellsworth Kelly (2)
3. Kelly, Ellsworth (2)
4. MoMA (2)
5. Museum of Modern Art, New … (2)

WHEN

1. 1973 (2)