Complex sentence: Christine Day is a young Broadway singer in New York City auditioning for a show, who comes across an old piece of music written nearly 100 years before by an unknown musician named Erik Destler.
Split into simpler sentences: Christine Day is a young Broadway singer in New York City. She is auditioning for a show, and comes across an old piece of music written nearly 100 years before by an unknown musician named Erik Destler.