When was the research paper on Knowledge representation by University of Manchester, UK published?
Mention the year in which University of Manchester, UK published a paper on Knowledge representation.
SELECT DISTINCT ?answer WHERE { <https://dblp.org/rec/journals/bib/StevensGB00> <https://dblp.org/rdf/schema#authoredBy> ?x . ?x <https://dblp.org/rdf/schema#primaryAffiliation> 'University of Manchester, UK' . <https://dblp.org/rec/journals/bib/StevensGB00> <https://dblp.org/rdf/schema#yearOfPublication> ?answer }
<https://dblp.org/rec/journals/bib/StevensGB00>