Four nationally acclaimed slam poets are coming to perform in D.C. this Saturday at a free event at George Washington University. The poets include Def Poetry Jam veteran Beau Sia (right), who was featured in the movies Slam and SlamNation, Rich Nichols, a community activist and manager of The Roots, and Steve Connell, who won the 2003 National Slam Poetry Contest with Team Los Angeles and performed as part of the Declare Yourself College Tour….