REMOVE

1. Nitrate negatives
2. Photographs
3. negative
4. Portrait photographs
5. Library of Congress Prints a …
6. between 1918 and 1920

WHAT

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

WHO

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

WHEN

1. 1869-1942 (1)
2. 1918 (1)
3. 1920 (1)
4. between 1918 and 1920 (1)