Mention the number of authors of the paper 'Social-Based Web Services Discovery and Composition for Step-by-Step Mashup Completion'.
How many authors does 'Social-Based Web Services Discovery and Composition for Step-by-Step Mashup Completion' have?
SELECT ?answer WHERE { <https://dblp.org/rec/conf/icws/MaaradjiHSLDC11> <https://dblp.org/rdf/schema#numberOfCreators> ?answer }
<https://dblp.org/rec/conf/icws/MaaradjiHSLDC11>