Complex sentence: The contest was held in front of a crowd of 80,000 spectators, a British post-war attendance record for a boxing event, surpassing the crowd at the City of Manchester Stadium when it hosted Ricky Hatton vs. Juan Lazcano in May 2008.
Split into simpler sentences: The contest was held in front of a crowd of 80,000 spectators. A British post-war attendance record for a boxing event, previously held by the City of Manchester Stadium when it hosted Ricky Hatton vs. Juan Lazcano in May 2008.