REMOVE

1. gelatin silver print
2. event, prison shakedown
3. occupation, prison guards
4. interior, cell block
5. Photographs

WHAT

1. event, prison shakedown (1)
2. gelatin silver print (1)
3. interior, cell block (1)
4. occupation, prison guards (1)

More 

WHERE

1. North American; American (1)
2. US, TX (1)

WHO

1. George Eastman House (1)
2. Lyon, Danny (1)

WHEN

1. 1967 (1)
2. 1968 (1)
3. ca. 1967-68 (1)