what is the {start time} for {Margot Kidder} has {country of citizenship} as {United States of America} ?
In what year did Margot Kidder become a USA citizen?
When was Margot Kidder received citizenship for the country United states of america?
SELECT ?u WHERE { resource:Margot_Kidder property:country_of_citizenship ?d . ?d property:country_of_citizenship resource:United_States_of_America . ?d property:start_time ?u }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q234471> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P27> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q30> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q234471 p:P27 ?s . ?s ps:P27 wd:Q30 . ?s pq:P580 ?value}