With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Tony Blair is involved in politics.
text_B: The Play-offs of the 2011 Fed Cup Europe / Africa Zone Group III were the final stages of the Group III Zonal Competition involving teams from Europe and Africa .. Europe. Europe. Africa. Africa. 2011 Fed Cup Europe / Africa Zone Group III. 2011 Fed Cup Europe / Africa Zone#Group III. Using the positions determined in their pools , the seven teams faced off to determine their placing in the 2011 Fed Cup Europe / Africa Zone Group III .. Europe. Europe. Africa. Africa. 2011 Fed Cup Europe / Africa Zone Group III. 2011 Fed Cup Europe / Africa Zone#Group III. The top two teams advanced to Fed Cup Europe / Africa Zone Group II .. Europe. Europe. Africa. Africa
not_related.