REMOVE

1. Nitrate negatives
2. Group portraits
3. Photographs
4. Portrait photographs
5. between 1915 and 1918
6. 1915

WHAT

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

WHO

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

WHEN

1. 1869-1942 (1)
2. 1918 (1)
3. between 1915 and 1918 (1)