Complex sentence: Her time was the second fastest ever in the half marathon (after Lornah Kiplagat) and the director of the New York City Marathon, Mary Wittenberg, suggested that she could become a world-beater over the full marathon distance in the coming years.
Split into simpler sentences: Her time was the second fastest ever in the half marathon (after Lornah Kiplagat). The director of the New York City Marathon, Mary Wittenberg, suggested that she could become a world-beater over the full marathon distance in the coming years.