38387
It was directed by Sidney Olcott with himself , Gene Gauntier , Helen Lindroth and Jack J. Clark in the leading roles .
 Sidney Olcott, Gene Gauntier, Helen Lindroth, Jack J. Clark
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Sidney Olcott, Gene Gauntier, Helen Lindroth, Jack J. Clark