In sum, 18919 SUDOC records, namely records featuring author and thesis advisor or author and opponent, allow us to at least infer <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">praeses</hi> and <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">respondens</hi>. For the remaining 20039 records this is not possible. This means that only 48.56% of SUDOC records allow for the tentative identification of <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">praeses</hi> and <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">respondens</hi>.