Name the replaced by where date of vacancy is 31 december 2008 where position in table is 1st
{'header': ['Team', 'Outgoing manager', 'Manner of departure', 'Date of vacancy', 'Replaced by', 'Date of appointment', 'Position in table'], 'page_title': '2008–09 Danish Superliga', 'section_title': 'Managerial changes', 'caption': 'Managerial changes', 'rows': [['AaB', 'Erik Hamrén', 'End of contract', '30 June 2008', 'Bruce Rioch', '1 July 2008', 'Pre-season'], ['FC Midtjylland', 'Erik Rasmussen', 'Resigned', '30 June 2008', 'Thomas Thomasberg', '1 July 2008', 'Pre-season'], ['AaB', 'Bruce Rioch', 'Sacked', '23 October 2008', 'Magnus Pehrsson', '1 January 2009', '11th'], ['Esbjerg fB', 'Troels Bech', 'Sacked', '16 November 2008', 'Ove Pedersen', '1 January 2009', '12th'], ['Brøndby IF', 'Tom Køhlert', 'Mutual consent', '31 December 2008', 'Kent Nielsen', '1 January 2009', '1st'], ['AC Horsens', 'Kent Nielsen', 'Resigned', '31 December 2008', 'Henrik Jensen', '1 January 2009', '12th'], ['AGF', 'Ove Pedersen', 'Sacked', '31 December 2008', 'Erik Rasmussen', '1 January 2009', '5th'], ['Randers FC', 'Colin Todd', 'Mutual consent', '5 January 2009', 'John Jensen', '5 January 2009', '7th']]}