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As a barrister he took part in several notable cases , including " Slade 's Case " , before earning enough political favour to be elected to Parliament , where he served first as Solicitor General and then as Speaker of the House of Commons .
 organization: House of Commons
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:
 organization: House of Commons