Complex sentence: Her collections are presented in New York with the aid of various sponsors-her Spring 2005 sponsor, Tiffany & Co, allowed her to present the collection at the jewelry company's 5th Avenue flagship store.
Split into simpler sentences: Her collections are presented in New York with the aid of various sponsors. Her Spring 2005 sponsor, Tiffany & Co., allowed her to present the collection at the jewelry company's 5th Avenue flagship store.