Paris:

There are several academic libraries and archives in Paris. The Sorbonne Library in the 5th arrondissement is the largest university library in Paris. In addition to the Sorbonne location, there are branches in Malesherbes, Clignancourt-Championnet, Michelet-Institut d'Art et d'Archéologie, Serpente-Maison de la Recherche, and Institut des Etudes Ibériques. Other academic libraries include Interuniversity Pharmaceutical Library, Leonardo da Vinci University Library, Paris School of Mines Library, and the René Descartes University Library.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". In what arrondissement is the Sorbonne library in Paris located?
5th