Doesn't Alfons L. not work at Leiden University, The Netherlands?
Isn't Alfons L. not affiliated with Leiden University?
ASK { <https://dblp.org/pid/05/7913> <https://dblp.org/rdf/schema#primaryAffiliation> 'Leiden University, The Netherlands' }
<https://dblp.org/pid/05/7913>