Complex sentence: Stephen Salyer is president and chief executive officer of the Salzburg Global Seminar, a non-profit organization based in Salzburg, Austria whose mission is to challenge current and future leaders to develop creative ideas for solving global problems.
Split into simpler sentences: Stephen Salyer is president and chief executive officer of the Salzburg Global Seminar. Salzburg is a non-profit organization whose mission is to challenge current and future leaders to develop creative ideas for solving global problems.