With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The United States Environmental Protection Agency began operation on December 2, 1970 from their headquarters in Delaware.
text_B: Gisela Maria Morales Valentin -LRB- born December 17 , 1987 -RRB- is an Olympic swimmer from Guatemala .. She competed at the 2004 and 2008 Olympics .. Guatemala at the 2004 Summer Olympics. 2008 Olympics. Guatemala at the 2008 Summer Olympics. She also won two bronze medals at the 2003 Pan American Games .. Pan American Games. Pan American Games. 2003 Pan American Games. Swimming at the 2003 Pan American Games. She attended college -LRB- and swam for -RRB- the USA 's Auburn University before transferring to the University of Texas .. Auburn University. Auburn University. University of Texas. University of Texas. Morales served as Guatemala 's flag-bearer at the 2004 Olympic Games , where she finished 27th and 26th in the 100m backstroke and the 200m backstroke respectively .. Guatemala at the 2004 Summer Olympics. 2004 Olympic Games. Guatemala at the 2004 Summer Olympics#Women's Competition. At the 2010 Central American and Caribbean Games , Morales won the Gold Medal in both the 50m backstroke and the 100m backstroke , and the Silver Medal in the 200m backstroke , in a close battle with Mexican competitor Fernanda Gonzalez .. Central American and Caribbean Games. Central American and Caribbean Games. 2010 Central American and Caribbean Games. Swimming at the 2010 Central American and Caribbean Games#Women. Fernanda Gonzalez. Fernanda Gonzalez. She represented Guatemala at the 2011 and 2015 Pan American Games .. Pan American Games. Pan American Games. 2011 Pan American Games. 2015 Pan American Games
not_related.