With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: WeChat has email as a feature.
text_B: Alexander Luderitz -LRB- born August 6 , 1973 in Berlin -RRB- is a former freestyle swimmer from Germany , who swam in the qualifying heats of the 4 × 100 m freestyle relay at the 1996 Summer Olympics in Atlanta , Georgia .. Berlin. Berlin. freestyle. freestyle swimming. swimmer. swimming ( sport ). Germany. Germany. 1996 Summer Olympics. 1996 Summer Olympics. In the final he was replaced by Christian Troger who , alongside Bengt Zikarsky , Bjorn Zikarsky , and Mark Pinger won the bronze medal .. Christian Troger. Christian Troger. Bengt Zikarsky. Bengt Zikarsky. Bjorn Zikarsky. Bjorn Zikarsky. Mark Pinger. Mark Pinger
not_related.