REMOVE

1. Concrete
2. Built Environments
3. Physical
4. Metal
5. United States
6. North America

WHAT

1. Sand (1)

WHERE

1. 13th and E Streets (1)
2. Golden Gate Park (1)

WHO

1. 6 Youth (ages 19-25) (1)
2. Cohen,Uriel (1)
3. McGinty,Tim (1)
4. Michael Painter & Associa … (1)
5. Moore,Gary T. (1)

WHEN

1. 1978 (2)
2. 1968 (1)