Complex sentence: Mike Schneider (born 1979) is the leader of the Mike Schneider Band, a Milwaukee, Wisconsin-based Slovenian-style polka band who performs approximately 100 events annually in Wisconsin and throughout the United States.
Split into simpler sentences: Mike Schneider (born 1979) is the leader of The Mike Schneider Polka Band. Schneider and his band perform approximately 100 events annually in Wisconsin and throughout the United States.