REMOVE

1. factories (structures)
2. campuses
3. trees
4. 1970
5. ca. 1970

WHAT

1. Visual Works (hierarchy n … (1)
2. Yaddo (1)
3. black-and-white film (1)
4. branches (plant component … (1)
5. brick (clay product) (1)

More 

WHERE

1. Yaddo, Saratoga Springs, … (1)

WHO

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

WHEN

1. 1934 (1)