What is the {milestone} for {commemorates} of {Jefferson Davis}
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Jefferson Davis is commemorated for what milestone ?
SELECT DISTINCT ?y WHERE { ?y rdf:type ontology:milestone . ?y property:commemorates resource:Jefferson_Davis }
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P547> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q162269> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q10145> } 
 select distinct ?sbj where { ?sbj wdt:P547 wd:Q162269 . ?sbj wdt:P31 wd:Q10145 } 
Maury Street Marker, Jefferson Davis Highway