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Books : Sheffield ( 1997 ) ; Doncaster ( 1998 ) ; Around Hoyland ( 1999 ) ; Around Hoyland A Second Selection ( 2000 ) ; Around Hoyland People & Places ( 2002 ) ; Around Sheffield then & Now ( 2002 ) ; Images of Sheffield ( 2005 ) ; South Yorkshire ( 2007 ) : A Century of Sheffield ( 1999 ) ; Sheffield Past & Present ( 2000 ) ; Doncaster Past & Present ( 2001 ) A Photographic History of Sheffield Steel ( 2001 ) : The Fitzwilliam ( Wentworth ) Estates ( 2002 ) ; North London Murders ( 2005 ) ; Foul Deeds & Suspicious Deaths in London 's East End ( 2005 ) ; Foul Deeds & Suspicious Deaths in London 's West End ( 2006 ) ; The A-Z OF London Murders ( 2007 ) ; Foul Deeds & Suspicious Deaths in & Around Barnsley ( 2007 ) ; Foul Deeds & Suspicious Deaths in & Around Sheffield ( 2009 ) ; More Foul Deeds & Suspicious Deaths in & Around Barnsley ( 2009 ) ; Foul Deeds & Suspicious Deaths in South Yorkshire ( 2010 ) ; Murder & Mayhem in North London ( 2010 ) References
 Sheffield, Hoyland, Hoyland, Hoyland, Sheffield, Sheffield, Sheffield, Sheffield, Sheffield, Barnsley, Sheffield, Barnsley
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sheffield, Hoyland, Hoyland, Hoyland, Sheffield, Sheffield, Sheffield, Sheffield, Sheffield, Barnsley, Sheffield, Barnsley