What is {given name} of {Mary Pickford} that is {series ordinal} is {1} ?
What first name did Mary Pickford use in real life?
What is Mary Pickford's first name?
SELECT ?e WHERE { FILTER ( ?x = 1 ) . ?t property:series_ordinal ?x . resource:Mary_Pickford property:given_name ?t . ?t property:given_name ?e }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q104109> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P735> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P1545> <1>
} 

SELECT ?obj WHERE { wd:Q104109 p:P735 ?s . ?s ps:P735 ?obj . ?s pq:P1545 ?x filter(contains(?x , '1')) }