Question: The name for the information leark for Juan Carlos I's significant event is what?
Paraphrase: The title for the data leark for Juan Carlos I's noteworthy occasion is what?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q19943 wdt:P793 ?obj . ?obj wdt:P31 wd:Q2904148 } 
Answer: Panama Papers