Question: When is the Prince of Beira's birthdate and who is his mother?
Paraphrase: When is the birthdate of the Prince of Beira and who is his mother?
SPARQL (Wikidata): SELECT ?value1 ?value2 WHERE { wd:Q939 p:P40 ?s . ?s ps:P40 wd:Q4765121 . ?s pq:P569 ?value1 . ?s pq:P25 ?value2 }