Complex sentence: In 1996, Salonga was in "Les Misérables" once again as Éponine in the London production of the musical, then continued on to perform the role in the musical's US national tour.
Split into simpler sentences: In 1996, Salonga was in "Les Misérables" once again. She played Éponine in the London production of the musical, then continued on to do the role in the musical's US national tour.