Question: When was the father of Albert, Duke of Schleswig-Holstein born? 
Sentence (from "Prince Christian of Schleswig-Holstein"): Prince Christian of Schleswig-Holstein (Frederick Christian Charles Augustus; 22 January 1831 – 28 October 1917) was a minor Danish-born German prince who became a member of the British Royal Family through his marriage to Princess Helena of the United Kingdom (25 May 1846 – 9 June 1923), the fifth child and third daughter of Queen Victoria and Prince Albert of Saxe-Coburg-Gotha.
Relevant evidence: Yes