With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: There are DVD and Blu-ray releases of Glee.
text_B: The 2004 -- 05 Segunda Liga season was the 15th season of the competition and the 71st season of recognised second-tier football in Portugal .. Segunda Liga. Segunda Liga. football. Association football. Portugal. Portugal
not_related.