Complex sentence: Campbell is also the organizer of the Phil Campbell Convention, held since 1995 in Phil Campbell, Alabama as well as the "I'm With Phil" campaign, a relief effort to help the residents of the town after a devastating tornado.
Split into simpler sentences: Campbell is also the organizer of the Phil Campbell Convention, held since 1995 in Phil Campbell, Alabama. He also organized the "I'm With Phil" campaign, a relief effort to help the residents of the town after a devastating tornado.