REMOVE

1. hills
2. scaffolds
3. townscapes (representations)
4. houses
5. buildings (structures)
6. atmospheric perspective

WHAT

1. Visual Works (hierarchy n … (1)
2. artists (visual artists) (1)
3. automobiles (1)
4. beards (1)
5. bushes (1)

More 

WHERE

1. San Francisco, California (1)

WHEN

1. 1970 (1)
2. ca. 1970 (1)