REMOVE

1. Nitrate negatives
2. negative
3. Genthe, Arnold
4. Library of Congress Prints a …
5. not before 1918 Nov. 18

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. 1918 (1)
3. 1920 (1)
4. not before 1918 Nov. 18 (1)