Original sentence: Excalibur is a celtic rock opera written and directed by Alan Simon, which premiered on July 24th, 2009 in the arena of Kaltenberg Castle.The show was a great success with over 17,000 spectators attending the performances on July 24th and 25th
Edited sentence: Excalibur is a celtic rock opera written and directed by Alan Simon, which premiered on July 24, 2009 in the arena of Kaltenberg Castle.The show was a great success with over 17,000 spectators attending the performances on July 24 and 25