Complex sentence: On 25 May 2010, Žigić signed a four-year contract with Premier League club Birmingham City for an undisclosed fee, which media speculation suggested to be in the region of £6 million.
Split into simpler sentences: On 25 May 2010, Žigić signed a four-year contract with Premier League club Birmingham City for an undisclosed fee. Media speculation suggested the fee to be in the region of £6 million.