Complex sentence: From 2000 to 2006, he held the Chair of Philosophy and History of Scientific Concepts at the Collège de France, the first Anglophone to be elected to a permanent chair in the Collège's history.
Split into simpler sentences: From 2000 to 2006, he held the Chair of Philosophy and History of Scientific Concepts at the Collège de France. Which is the first Anglophone to be elected to a permanent chair in the Collège's history.