Complex sentence: Hart also recruited and coached Jeremy Wariner and Darold Williamson at Baylor, before Wariner won the 400 meter individual at the 2004 Summer Olympics in Athens, Greece followed by a 4x400 relay win by a team featuring both Wariner and Williamson at that same Olympics.
Split into simpler sentences: Hart also recruited and coached Jeremy Wariner and Darold Williamson before Wariner won the 400 meter individual at the 2004 Summer Olympics in Athens, Greece. This was followed by a 4x400 relay win by a team featuring both Wariner and Williamson at that same Olympics.