Question: Who is the father-in-law of Yang Huiyu?
Sentence (from "Barthold A. Butenschøn Sr."): Through his daughter Marie Claudine he was the father- in- law of Joakim Lehmkuhl, through his daughter Mabel Anette he was the father- in- law of Harald Astrup( a son of Sigurd Astrup) and through his daughter Nini Augusta he was the father- in- law of Ernst Torp.
Relevant evidence: No