Complex sentence: A medallion was struck to commemorate the coronation of Edward VII and Queen Alexandra-one side portrayed the Royal heads, and the other side was the inscription Heathfield, Sussex, 1902.
Split into simpler sentences: A medallion was made to remember the coronation of Edward VII and Queen Alexandra. One side of the medallion portrayed the Royal Heads, and the other side was the inscription: Heathfield, Sussex, 1902.