what is the {language of work or name} for {March} has {named after} as {Betula} ?
Which language is March named after Betula?
For what language is March named after Betula?
SELECT ?y WHERE { ?p property:named_after resource:Betula . ?p property:language_of_work_or_name ?y . resource:March property:named_after ?p }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q110> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P138> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q25243> .
?statement <http://www.wikidata.org/entity/P407> ?value. 
} 

SELECT ?value WHERE { wd:Q110 p:P138 ?s . ?s ps:P138 wd:Q25243 . ?s pq:P407 ?value}