REMOVE

1. tile (materials)
2. neckties
3. fountains
4. trees
5. plants
6. barriers

WHAT

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

More 

WHERE

1. Ensenada, Baja California … (1)

WHEN

1. 1949 (1)