Question: WHat is the name of the Belgrade Airport ?
Paraphrase: Belgrade's Airport is called what?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P931 wd:Q3711 . ?sbj wdt:P31 wd:Q1248784 } 
Answer: Belgrade Nikola Tesla Airport, Lisičji Jarak Airport, Progar Airport