With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Outdoor recreation is a pursuit British Columbia engages in.
text_B: SDB-006 is a drug that acts as a potent agonist for the cannabinoid receptors , with an EC50 of 19 nM for human CB2 receptors , and 134 nM for human CB1 receptors .. agonist. agonist. It was discovered during research into the related compound SDB-001 which had been sold illicitly as `` 2NE1 '' .. SDB-001. SDB-001
not_related.