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As a young boy , he began to stammer and attended weekly sessions with the speech therapist Lionel Logue to help him manage it .
 person: Lionel Logue
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: Lionel Logue