Mention the number of authors of the paper 'Air Quality Based Informational Intervention Framework To Promote Healthy And Active School Travel'.
The paper 'Air Quality Based Informational Intervention Framework To Promote Healthy And Active School Travel' has how many authors?
SELECT ?answer WHERE { <https://dblp.org/rec/conf/euspn/AhmedAJYW18> <https://dblp.org/rdf/schema#numberOfCreators> ?answer }
<https://dblp.org/rec/conf/euspn/AhmedAJYW18>