Complex sentence: Jim Rathmann and Rodger Ward battled out nearly the entire second half, with Rathmann sealing the victory when Ward was forced to slow down in the waning laps due to a worn out tire.
Split into simpler sentences: Jim Rathmann and Rodger Ward battled out nearly the entire second half. Rathmann sealed the victory when Ward was forced to slow down in the waning laps due to a worn out tire.