REMOVE

1. Portrait photographs
2. Nitrate negatives
3. negative
4. Library of Congress Prints a …
5. between 1915 and 1923
6. 1915

WHAT

1. Nitrate negatives (1)
2. Photographs (1)
3. Portrait photographs (1)

WHO

1. Genthe, Arnold (1)
2. Library of Congress Print … (1)

WHEN

1. 1869-1942 (1)
2. 1923 (1)
3. between 1915 and 1923 (1)