query: #title: Double birth date with a mistake on a birth date
  # Complex constraint from [[Property talk:P569]]
  # Diff: 1000 years
  SELECT ?item ?born1 ?born2
    WHERE {
      ?item wdt:P569 ?born1.
      ?item wdt:P569 ?born2.
      FILTER (?born1 != ?born2).
      FILTER (YEAR(?born1) > YEAR(?born2) + 1000).
      ?item wdt:P31 wd:Q5.
    }
    LIMIT 1