REMOVE

1. Photographs
2. negative
3. Group portraits
4. Library of Congress Prints a …
5. between 1916 and 1918
6. 1916

WHAT

1. Dancers. (1)
2. Glass negatives (1)
3. Group portraits (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 1916 and 1918 (1)