Complex sentence: He holds the Guinness World Record for the most performances in the same Broadway show, having appeared in the musical Phantom of the Opera on 9,382 occasions over a period of 23 years.
Split into simpler sentences: He holds the Guinness World Record for the most performances in the same Broadway show. Andrews hold the record because he has appeared in the musical Phantom of the Opera on 9,382 occasions, over a period of 23 years.