With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Ku Klux Klan flourished in the late 1820s.
text_B: Childs v Desormeaux , is a Supreme Court of Canada decision on the topic of social host liability .. Supreme Court of Canada. Supreme Court of Canada. social host liability. social host liability. The Court held that a social host does not owe a duty of care to a person injured by a guest who has consumed alcohol .
not_related.