With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Russia is part of both Europe and Asia.
text_B: Charles Chamberlain may refer to  :. Charles E. Chamberlain -LRB- 1917 -- 2002 -RRB- , U.S. Representative from Michigan. Charles E. Chamberlain. Charles E. Chamberlain. Charles H. Chamberlain -LRB- 1841-1894 -RRB- , Civil War veteran and author of the Illinois -LRB- state song -RRB-. Charles Joseph Chamberlain -LRB- 1863 -- 1943 -RRB- , American botanist. Charles Joseph Chamberlain. Charles Joseph Chamberlain. Charles R. Chamberlain -LRB- born 1969 -RRB- , American political leader. Charles R. Chamberlain. Charles R. Chamberlain
not_related.