Simplify the following text for a Grade 3 native English-speaking person.
Original: Dr. SchÃ n 's son , Alwa , a musician , arrives . He excuses himself because he has to go to a rehearsal , and he and Dr. SchÃ n leave .
Simplified: Dr. SchÃ nâ s son Alwa arrives , excuses himself , and he and Dr. SchÃ n leave .