REMOVE

1. black-and-white film
2. utility poles
3. ladders
4. plants
5. machinery

WHAT

1. buildings (structures) (1)
2. exterior views (1)
3. fences (1)
4. platforms (general) (1)
5. railroads (1)
6. rails (transit system ele … (1)
7. service stations (1)
8. signs (declatory or adver … (1)
9. sky (1)
10. Visual Works (hierarchy n … (1)

WHEN

1. 1920 (1)
2. 1940 (1)
3. between 1920 - 1940 (1)