REMOVE

1. rivers
2. doors
3. automobiles
4. shadows
5. buildings (structures)

WHAT

1. Visual Works (hierarchy n … (1)
2. artists (visual artists) (1)
3. black-and-white film (1)
4. chairs (furniture forms) (1)

More 

WHERE

1. Ensenada, Baja California … (1)

WHEN

1. 1949 (1)