With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Singapore won its autonomy directly from Britain in 1963 and has been sovereign since.
text_B: George Stadel -LRB- September 21 , 1881 -- November 13 , 1952 -RRB- was an American tennis player .. tennis. tennis. He competed in the men 's singles and doubles events at the 1904 Summer Olympics .. doubles. Tennis at the 1904 Summer Olympics – Men's doubles. 1904 Summer Olympics. 1904 Summer Olympics
not_related.