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George Mitchell acted in several films and television episodes with his wife , Katherine Squire , the two of them often playing a husband-and-wife couple intrinsic to the story .
 Mitchell, Katherine Squire
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Mitchell, Katherine Squire