What is {position held} of {John C. Calhoun} that is {series ordinal} is {16} ?
What position did John C. Calhoun hold in Series Ordinal when he was 16?
SELECT ?obj WHERE { wd:Q207191 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P1545 ?x filter(contains(?x,'16')) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q207191> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P39> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P1545> <16>
} 

Which position did John C. Calhoun hold in Series Ordinal when he was 16?