REMOVE

1. paths
2. hills
3. cranes (equipment)
4. rivers
5. clouds
6. fences
7. machinery

WHAT

1. Visual Works (hierarchy n … (1)
2. black-and-white film (1)
3. buildings (structures) (1)
4. bushes (1)
5. children (1)

More 

WHERE

1. Westlock, Alberta, Canada (1)

WHEN

1. 1946 (1)
2. after 1946 (1)