How many authors does the publication 'Playing educational math games at home: The Monkey Tales case' have?
Mention the number of authors of the paper 'Playing educational math games at home: The Monkey Tales case'.
SELECT ?answer WHERE { <https://dblp.org/rec/journals/entcom/DerbovenZGG16> <https://dblp.org/rdf/schema#numberOfCreators> ?answer }
<https://dblp.org/rec/journals/entcom/DerbovenZGG16>