Complex sentence: The Ludwig von Mises Institute was established in 1982 with the support of Margit von Mises, widow of Ludwig von Mises, who chaired the Institute's board until her death in 1993.
Split into simpler sentences: The Ludwig von Mises Institute was established in 1982 with the support of Margit von Mises, widow of Ludwig von Mises. She chaired the Institute's board until her death in 1993.