what is the {point in time} for {Arvo Pärt} has {award received} as {Honorary doctor of the University of Liège} ?
When did Arvo Pärt receive an honorary Doctorate from the University of Liège?
SELECT ?value WHERE { wd:Q189534 p:P166 ?s . ?s ps:P166 wd:Q23700921 . ?s pq:P585 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q189534> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P166> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q23700921> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

When did Arvo Pärt get an privileged Doctorate from the College of Liège?