Find the number of authors of the paper 'Review: Book Review'.
How many authors does 'Review: Book Review' have?
SELECT ?answer WHERE { <https://dblp.org/rec/journals/cj/Needham61a> <https://dblp.org/rdf/schema#numberOfCreators> ?answer }
<https://dblp.org/rec/journals/cj/Needham61a>