what is the {end time} for {Michael Crichton} has {spouse} as {Anne-Marie Martin} ?
In what year did Michael Crichton end his relationship with Anne-Marie Martin?
SELECT ?value WHERE { wd:Q172140 p:P26 ?s . ?s ps:P26 wd:Q564851 . ?s pq:P582 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q172140> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P26> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q564851> .
?statement <http://www.wikidata.org/entity/P582> ?value. 
} 

When did Anne-Marie Martin and Michael Crichton split apart?