Simplify the following text for a Grade 11 native English-speaking person.
Original: The topic of inappropriate IM use became front page news in October 2006 when Congressman Mark Foley resigned his seat after admitting sending offensive instant messages of a sexual nature to underage former House pages from his Congressional office PC .
Simplified: The topic of inappropriate IM use became front page news in October 2006 when U.S. Congressman Mark Foley resigned his seat after admitting sending offensive instant messages of a sexual nature to underage former House pages from his Congressional office PC .