With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ulysses S. Grant fought the Civil War.
text_B: Robert Townson -LRB- 1762 -- 1827 -RRB- was an English natural historian and traveller , known also a mineralogist and medical man .. In 1806 he emigrated to New South Wales .. New South Wales. New South Wales
not_related.