REMOVE

1. hills
2. clouds
3. machinery
4. rivers
5. mountains

WHAT

1. airplanes (1)
2. black-and-white film (1)
3. boys (1)
4. coats (garments) (1)
5. fields (land) (1)
6. hats (1)
7. horizon line (1)
8. landscapes (representatio … (1)
9. models (representations) (1)
10. plants (1)
11. portraits (1)
12. sky (1)
13. snow (precipitation) (1)
14. toys (recreational artifa … (1)
15. uniforms (1)
16. utility poles (1)
17. Visual Works (hierarchy n … (1)

Less

WHERE

1. Bow Island, Alberta, Cana … (1)

WHEN

1. 1912 (1)
2. 1920 (1)
3. between 1912 - 1920 (1)