With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: In 1858, Abraham Lincoln spoke out against the expansion of slavery.
text_B: The Sackville River is a river in Hants County and Halifax Regional Municipality , Nova Scotia , Canada .. Canada. Canada. Hants County. Hants County, Nova Scotia. Halifax Regional Municipality. Halifax Regional Municipality. Nova Scotia. Nova Scotia. It empties into Bedford Basin .. Bedford Basin. Bedford Basin. The Little Sackville River is a tributary .. Little Sackville River. Little Sackville River
not_related.