Question: Who is Helbirga Of Austria's mother-in-law?
Sentence (from "Bořivoj II, Duke of Bohemia"): Bořivoj II (c. 1064 – 2 February 1124) was the duke of Bohemia from 25 December 1100 until May 1107 and from December 1117 until 16 August 1120.
Relevant evidence: No