With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Martina Hingis plays tennis professionally.
text_B: Marian Sarah Ogilvie Farquharson , FLS , FRMS -LRB- nee Ridley , 2 July 1846 -- 20 April 1912 -RRB- was a British naturalist and women 's rights activist .. FLS. Fellow of the Linnean Society. FRMS. Fellow of the Royal Microscopical Society. naturalist. naturalist. The first female Fellow of the Royal Microscopical Society , Farquharson is best remembered for her campaign of women rights to full fellowship of learned societies .. Royal Microscopical Society. Royal Microscopical Society. learned societies. learned societies
not_related.