With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Prison Break was released on DVD.
text_B: Afon Taf High School is a comprehensive high school for pupils aged 11 to 16 , based in the village of Troed-y-rhiw in Merthyr Tydfil County Borough , Wales .. comprehensive. Comprehensive school. Troed-y-rhiw. Troed-y-rhiw. Merthyr Tydfil County Borough. Merthyr Tydfil County Borough. Wales. Wales. It serves a large catchment area of surrounding villages in the Merthyr valley , from Abercanaid & Pentrebach in the north to Bedlinog in the south .. Abercanaid. Abercanaid. Pentrebach. Pentrebach. Bedlinog. Bedlinog
not_related.