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Today , The Battle of Gettysburg is considered a lost film , and all that remains of that endeavor are the battlefield scenes appropriated by Sennett for his slapstick film .
 person: Sennett
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Sennett