The Colorado Chautauqua Association in Boulder announced its annual summer slate of concerts, which includes performances by Bela Fleck, Bruce Hornsby, Ziggy Marley and Graham Nash. The lineup also features a comedy set from Paula Poundstone and an appearance by Boulder poet and activist Andrea Gibson. Chautauqua also announced other summer programming, including the Colorado Music Festival, the 33rd annual Silent Film Series with live musical accompaniment, a screening of the film “Symbols of Resistance,” TEDxBoulder and Ignite Boulder and hiking plays.