Complex sentence: The Borromeo String Quartet is an American string quartet in residence at the New England Conservatory since 1992 that has performed throughout North and South America, Europe and Asia at numerous festivals and on many distinguished chamber music series.
Split into simpler sentences: The Borromeo String Quartet is an American string quartet, in residence at the New England Conservatory since 1992. They have performed throughout North and South America, Europe and Asia at numerous festivals and in many distinguished chamber music series.