Question: Why did João Carlos, Prince Of Beira's father die?
Sentence (from "João Carlos, Prince of Beira"): João Carlos Pedro Leopoldo Borromeu, Prince of Beira;  (6 March 1821, Rio de Janeiro, Brazil – 4 February 1822, Rio de Janeiro, Brazil) was a Portuguese "infante" (prince), son of heir-apparent to the throne
Relevant evidence: No