what is the {series ordinal} for {Roy Keane} has {given name} as {Roy} ?
What number was worn by Roy Keane?
What was Roy Keane's number?
SELECT ?h WHERE { ?v property:series_ordinal ?h . ?v property:given_name resource:Roy . resource:Roy_Keane property:given_name ?v }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q188632> .
?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> <http://wikidata.dbpedia.org/resource/Q2170752> .
?statement <http://www.wikidata.org/entity/P1545> ?value. 
} 

SELECT ?value WHERE { wd:Q188632 p:P735 ?s . ?s ps:P735 wd:Q2170752 . ?s pq:P1545 ?value}