With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Gillian Jacobs appeared on the album Life Partners.
text_B: Polona Hercog was the two-time defending champion , but decided to compete at an ITF $ 100,000 event at Olomouc instead .. Polona Hercog. Polona Hercog. Olomouc. 2013 ITS Cup – Singles. Serena Williams won the title , defeating Johanna Larsson in the final , 6 -- 4 , 6 -- 1 .. Serena Williams. Serena Williams. Johanna Larsson. Johanna Larsson ( tennis )
not_related.