REMOVE

1. streets
2. doors
3. balconies
4. plants
5. yards (areas)
6. houses

WHAT

1. Visual Works (hierarchy n … (1)
2. artists (visual artists) (1)
3. automobiles (1)
4. black-and-white film (1)
5. branches (plant component … (1)

More 

WHEN

1. 1960 (1)
2. 1970 (1)
3. between 1960 - 1970 (1)