Once there was and once there wasn't
type: WorkPerformance
piano: http://data.carnegiehall.org/names/87712
violin: http://data.carnegiehall.org/names/101313
performer: http://data.carnegiehall.org/names/87712
performer: http://data.carnegiehall.org/names/101313
work performed: http://data.carnegiehall.org/works/95123