How many authors does the publication 'Collaborative Fairness in Federated Learning' have?
Mention the number of authors of the paper 'Collaborative Fairness in Federated Learning'.
SELECT ?answer WHERE { <https://dblp.org/rec/journals/corr/abs-2008-12161> <https://dblp.org/rdf/schema#numberOfCreators> ?answer }
<https://dblp.org/rec/journals/corr/abs-2008-12161>