What is {series} of {Once Upon a Time in the West} that is {series ordinal} is {1} ?
What was the first book called in the series Once Upon a Time in the West?
What is the first in the series of Once Upon a Time in the West?
SELECT ?k WHERE { resource:Once_Upon_a_Time_in_the_West property:part_of_the_series ?n . ?n property:series_ordinal ?k . FILTER ( ?k = 1 ) . ?n property:part_of_the_series ?k }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q168154> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P179> .
?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:Q168154 p:P179 ?s . ?s ps:P179 ?obj . ?s pq:P1545 ?x filter(contains(?x , '1')) }