Complex sentence: Ruth Monicka Parasol (born 1967) founded PartyGaming in 1997, the parent company of online poker site PartyPoker.com, which issued its initial public offering (IPO) on the London Stock Exchange in June 2005.
Split into simpler sentences: Ruth Monicka Parasol founded PartyGaming, the parent company of online poker site PartyPoker.com, in 1997. The company issued its initial public offering (IPO) on the London Stock Exchange in June 2005.