REMOVE

1. driveways
2. sky
3. trucks
4. houses
5. black-and-white film

WHAT

1. Visual Works (hierarchy n … (2)
2. automobiles (2)
3. buildings (structures) (2)
4. exterior views (2)

More 

WHERE

1. New Windsor, Maryland (2)

WHO

1. Campbell, Sandra L. Still (1)
2. Clyfford Still; Still, Cl … (1)
3. Sandra L. Still Campbell; … (1)
4. Still, Clyfford (1)

Less

WHEN

1. 1969 (1)
2. 1971 (1)
3. ca. 1971 (1)