With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Seville has a metropolitan population of 5 million.
text_B: The 2002 -- 03 Ranji Trophy was the 69th season of the Ranji Trophy .. Ranji Trophy. Ranji Trophy. Mumbai defeated Tamil Nadu by 141 runs in the final .. Mumbai. Mumbai cricket team
not_related.