Complex sentence: This was the third occasion on which Holyfield won the WBA heavyweight title--however, the fight was not recognised as being for the linear heavyweight championship, which was held by George Foreman at the time.
Split into simpler sentences: This was the third occasion on which Holyfield won the WBA heavyweight title. However, the fight was not recognized as being for the linear heavyweight championship, which was held by George Foreman at the time.