REMOVE

1. windows
2. plants
3. roads
4. girls
5. boys
6. bridges (built works)

WHAT

1. artists (visual artists) (1)
2. automobiles (1)
3. black-and-white film (1)
4. branches (plant component … (1)
5. coats (garments) (1)
6. driveways (1)
7. fields (land) (1)
8. groves (plant communities … (1)
9. hats (1)
10. men (male humans) (1)
11. portraits (1)
12. scarves (costume accessor … (1)
13. sky (1)
14. trees (1)
15. Visual Works (hierarchy n … (1)

WHEN

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