REMOVE

1. bushes
2. boys
3. railroads
4. children
5. automobiles
6. rock
7. sky
8. landscapes (representations)

WHAT

1. Visual Works (hierarchy n … (1)
2. black-and-white film (1)
3. buildings (structures) (1)
4. construction equipment (1)

More 

WHERE

1. Westlock, Alberta, Canada (1)

WHEN

1. 1946 (1)
2. ca. 1946 (1)