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His Excellency is a 1952 British comedy film directed by Robert Hamer and starring Eric Portman , Cecil Parker , Helen Cherry .
 Robert Hamer, Eric Portman, Cecil Parker, Helen Cherry
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Robert Hamer, Eric Portman, Cecil Parker, Helen Cherry