REMOVE

1. Photographs
2. Opera singers.
3. Nitrate negatives
4. Library of Congress Prints a …
5. 1921
6. 1921 Feb. 1

WHAT

1. Nitrate negatives (1)
2. Opera singers. (1)
3. Portrait photographs (1)
4. negative (1)

WHO

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

WHEN

1. 1869-1942 (1)
2. 1921 Feb. 1 (1)