List all the primary affiliations of Jonathan Roberts and Yousef E..
What are the primary affiliations of Roberts, J. and Yousef E.?
SELECT DISTINCT ?answer WHERE { { <https://dblp.org/pid/54/6461> <https://dblp.org/rdf/schema#primaryAffiliation> ?answer } UNION { <https://dblp.org/pid/172/5309> <https://dblp.org/rdf/schema#primaryAffiliation> ?answer } }
<https://dblp.org/pid/54/6461> <https://dblp.org/pid/172/5309>