Mention the number of authors of the paper 'Attribute reduction for multi-label classification based on labels of positive region'.
How many authors does 'Attribute reduction for multi-label classification based on labels of positive region' have?
SELECT ?answer WHERE { <https://dblp.org/rec/journals/soco/FanCQWT20> <https://dblp.org/rdf/schema#numberOfCreators> ?answer }
<https://dblp.org/rec/journals/soco/FanCQWT20>