With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Santos FC is the 4th richest sports club in Brazil.
text_B: There are several notable bulletin board systems -LRB- BBS -RRB- for the Texas Instruments TI-99  /  4A .. Technology writer Ron Albright wrote of several BBS applications written for the TI-99  /  4A in the March 1985 article Touring The Boards in the monthly TI-99  /  4A magazine MICROpendium .. Ron Albright. Ron Albright. While Albright 's article references several notable bulletin board systems , it does not confirm what was the first BBS system written for the TI-99  /  4A .
not_related.