REMOVE

1. Portrait photographs
2. Nitrate negatives
3. negative
4. Genthe, Arnold
5. Library of Congress Prints a …
6. between 1917 and 1929

WHAT

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

WHO

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

WHEN

1. 1869-1942 (1)
2. 1917 (1)
3. 1929 (1)
4. between 1917 and 1929 (1)