With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ryuk (Death Note) is from a manga series.
text_B: Elisabeth Helene von Vieregg -LRB- 4 May 1679 -- 27 June 1704 -RRB- , Countess of Antvorskov , was a Danish noble and lady-in-waiting of German origin .. lady-in-waiting. lady-in-waiting. She was the royal mistress of King Frederick IV of Denmark and , later , his first morganatic wife by bigamy .. Frederick IV of Denmark. Frederick IV of Denmark. royal mistress. royal mistress. morganatic. morganatic. bigamy. bigamy
not_related.