REMOVE

1. gelatin silver print
2. Photographs
3. architecture, stairway
4. Canada, ONT, Toronto
5. George Eastman House

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)

WHEN

1. 1973 (1)