REMOVE

1. trees
2. clouds
3. Yaddo

WHAT

1. Visual works (hierarchy n … (4)
2. blue (4)
3. brown (4)
4. figures (4)
5. oil paint (4)

More 

WHERE

1. Yaddo, Saratoga Springs, … (2)
2. Killam, Alberta, Canada (1)
3. Pullman, Washington (1)

WHO

1. Still, Clyfford (4)

WHEN

1. 1935 (2)
2. 1929 (1)
3. 1934 (1)