REMOVE

1. children
2. windows
3. rubbish
4. railroads
5. garages
6. artists (visual artists)

WHAT

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

More 

WHERE

1. Westlock, Alberta, Canada (1)

WHEN

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