Complex sentence: A copy of the radio broadcast of the game was only uncovered in 1988: a Philadelphian had recorded with a Dictaphone part of Campbell's coverage in the fourth quarter, but only the Warriors possessions.
Split into simpler sentences: A copy of the radio broadcast of the game was only uncovered in 1988. However, a Philadelphian had recorded with a Dictaphone part of Campbell's coverage in the fourth quarter, but only the Warriors possessions.