REMOVE

1. gelatin silver print
2. Photographs
3. people, being photographed
4. architecture, stairway
5. George Eastman House
6. 1973

WHAT

1. architecture, stairway (1)
2. gelatin silver print (1)
3. people, being photographe … (1)

WHERE

1. Canada, ONT, Toronto (1)
2. North American; American (1)

WHO

1. George Eastman House (1)
2. Mertin, Roger (1)