Question: What is the source of claim of the house of Lê Thánh Tông?
Paraphrase: What is the source of claim of the house of Lê Thánh Tông?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q1771050 wdt:P53 ?X . ?X wdt:P248 ?answer}
Answer: Encyclopædia Britannica, Soviet historic encyclopedia