what is the {instance of} for {Goguryeo} has {dissolved, abolished or demolished} as {668-1-1} ?
What caused the 668 dissolution of Goguryeo?
Why was Goguryeo dissolved in 668?
SELECT ?k WHERE { FILTER ( CONTAINS ( ?f , '668-1-1' ) ) . resource:Goguryeo property:dissolved,_abolished_or_demolished_date ?n . ?n rdf:type ?k . ?n property:dissolved,_abolished_or_demolished_date ?f }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q28370> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P576> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <668-1-1> .
?statement <http://www.wikidata.org/entity/P31> ?value. 
} 

SELECT ?value WHERE { wd:Q28370 p:P576 ?s . ?s ps:P576 ?x filter(contains(?x , '668-1-1')) . ?s pq:P31 ?value}