The paper 'Attributed Non-negative Matrix Multi-factorization for Data Representation' was published in which year?
'Attributed Non-negative Matrix Multi-factorization for Data Representation' was published in which year?
SELECT DISTINCT ?answer WHERE { <https://dblp.org/rec/conf/prcv/WangSGHY21> <https://dblp.org/rdf/schema#yearOfPublication> ?answer }
<https://dblp.org/rec/conf/prcv/WangSGHY21>