Count the papers published by the authors of 'Partitioned Least Squares' in 2019.
In 2019, how many papers did the authors of 'Partitioned Least Squares' publish?
SELECT DISTINCT (COUNT(?answer) AS ?count) WHERE { <https://dblp.org/rec/conf/aiia/EspositoC019> <https://dblp.org/rdf/schema#authoredBy> ?x . ?answer <https://dblp.org/rdf/schema#authoredBy> ?x . ?answer <https://dblp.org/rdf/schema#yearOfPublication> '2019' }
<https://dblp.org/rec/conf/aiia/EspositoC019>