Complex sentence: His first official gallery show was on June 5,2009 in Portland, Oregon, and featured a series of his Zenga paintings and sculptures, a 500 year old Japanese tradition that focuses on the circular form of the enso (Zen circle).
Split into simpler sentences: His first official gallery show was on June 5,2009 in Portland, Oregon, and featured a series of his Zenga paintings and sculptures. Zenga is a 500 year old Japanese tradition that focuses on the circular form of the enso (Zen circle).