Find the number of authors of the paper 'Common datum'.
Mention the number of authors of the paper 'Common datum'.
SELECT ?answer WHERE { <https://dblp.org/rec/conf/siggraph/KleinP21> <https://dblp.org/rdf/schema#numberOfCreators> ?answer }
<https://dblp.org/rec/conf/siggraph/KleinP21>