REMOVE

1. stairs
2. hats
3. plants
4. towers (building divisions)
5. artists (visual artists)

WHAT

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

More 

WHERE

1. Ensenada, Baja California … (1)

WHEN

1. 1949 (1)