Question: Who is the head of government of University of North Carolina at Chapel Hill since 2013-7-1?
Paraphrase: Who was the president of UNC Chapel Hill beginning 2013-7-1?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q192334 p:P6 ?s . ?s ps:P6 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'2013')) }