REMOVE

1. Portrait photographs
2. negative
3. Nitrate negatives
4. between 1917 and 1929
5. 1917

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. 1929 (1)
3. between 1917 and 1929 (1)