Simplify the following text for a Grade 11 native English-speaking person.
Original: Siegmund `` Sigi '' Nissel ( January 3 , 1922 , Munich - May 21 , 2008 , London ) was an German-born British violinist who played second violin in the Amadeus Quartet and served as its administrator .
Simplified: Siegmund Nissel ( January 3 , 1922 â `` May 21 , 2008 ) was an Austrian-born British violinist who played second violin in the famous Amadeus Quartet .