With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mexico gained independence.
text_B: 2010 Regional League Division 2 Southern Region is the 2nd season of the League competition since its establishment in 2009 .. 2009 Thai Division 2 League Southern Region. 2010 Regional League Division 2. 2010 Regional League Division 2. It is in the third tier of the Thai football league system .. Thai football league system. Thai football league system. The league has been expanded from 8 clubs in 2009 to 14 clubs this season .. 2009 Thai Division 2 League Southern Region. The league winners and runners up will qualify for the 2010 Regional League Division 2 championship stage .. 2010 Regional League Division 2. 2010 Regional League Division 2
not_related.