With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Avatar: The Last Airbender's antagonist is Aang.
text_B: The 11 municipalities of the Tavastia Proper Region -LRB- Kanta-Hame Egentliga Tavastland -RRB- in Finland are divided on three sub-regions  :. municipalities. Municipalities of Finland. Tavastia Proper Region. Tavastia Proper. Finland. Finland. sub-regions. Sub-regions of Finland. NOTOC
not_related.