Mention the count of papers published by the authors of 'PittGrub: A Frustration-Free System to Reduce Food Waste by Notifying Hungry College Students' in ACM International Conference on Knowledge Discovery and Data Mining.
How many publications did the authors of the paper 'PittGrub: A Frustration-Free System to Reduce Food Waste by Notifying Hungry College Students' publish in ACM International Conference on Knowledge Discovery and Data Mining?
SELECT DISTINCT (COUNT(?answer) AS ?count) WHERE { <https://dblp.org/rec/conf/kdd/SilvisSL18> <https://dblp.org/rdf/schema#authoredBy> ?x . ?answer <https://dblp.org/rdf/schema#authoredBy> ?x . ?answer <https://dblp.org/rdf/schema#publishedIn> 'KDD' }
<https://dblp.org/rec/conf/kdd/SilvisSL18>