REMOVE

1. black-and-white film
2. sidewalks
3. pillars
4. doors
5. stairs
6. fields (land)

WHAT

1. Visual Works (hierarchy n … (2)
2. buildings (structures) (2)
3. bushes (2)
4. children (2)

More 

WHERE

1. New Windsor, Maryland (1)
2. Westlock, Alberta, Canada (1)

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. 1946 (1)
2. 1969 (1)
3. after 1946 (1)