Complex sentence: On March 1,2010, it was announced that Lysacek would be a celebrity contestant on "Dancing with the Stars" for the tenth season, which premiered on Monday, March 22,2010.
Split into simpler sentences: On March 1,2010, it was announced that Lysacek would be a celebrity contestant on "Dancing with the Stars" for the tenth season. The season premiered on Monday, March 22,2010.