Question: Who is Katarina Konstantinović's uncle?
Sentence (from "Princess Anka Obrenović"): Princess Anka Obrenović (later Anka Konstantinović, ; 1 April 1821 – 10 June 1868 [29 May o.s.]) was a member of the Serbian royal Obrenović dynasty as the niece of the dynasty's founder
Relevant evidence: No