With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: One President of America was Abraham Lincoln.
text_B: Eugenio Saller -LRB- born 5 June 1928 -RRB- is a retired Brazilian tennis player .. He competed at Wimbledon and French Open in 1952 , but was eliminated in the first round .. 1952 Wimbledon Championships – Men's Singles. Wimbledon. Wimbledon Championships. French Open. French Open
not_related.