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BBC and South Yorkshire Police chiefs summoned before MPs after " claim of cover-up " over Cliff Richard home raid http://t.co/OKnzMbrAq0
 BBC, South Yorkshire Police, Cliff Richard
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 BBC, South Yorkshire Police, Cliff Richard