Complex sentence: The main event of the weekend is the "Pennsylvania Society Dinner," which is sponsored by "The Pennsylvania Society," a nonprofit corporation, but in recent years the receptions hosted by lobbyists, political committees, and corporations have taken on increased importance.
Split into simpler sentences: The main event of the weekend is the "Pennsylvania Society Dinner," which is sponsored by "The Pennsylvania Society," a nonprofit corporation. In recent years the receptions hosted by lobbyists, political committees, and corporations have taken on increased importance.