Find the number of authors of the paper 'Predicting query reformulation during web searching'.
How many authors does the publication 'Predicting query reformulation during web searching' have?
SELECT ?answer WHERE { <https://dblp.org/rec/conf/chi/JansenBS09> <https://dblp.org/rdf/schema#numberOfCreators> ?answer }
<https://dblp.org/rec/conf/chi/JansenBS09>