Question: What secret police organization was led by Lavrentiy Beria ?
Paraphrase: What organization did Lavrentiy Beria lead?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q141829 wdt:P598 ?obj . ?obj wdt:P31 wd:Q214183 } 
Answer: NKVD, Main Directorate of State Security