With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Wladimir Klitschko reached a career peak of number three on The Rings pound for pound list.
text_B: This is a list of flag bearers who have represented Yemen at the Olympics .. Flag bearers carry the national flag of their country at the opening ceremony of the Olympic Games .. opening ceremony. Olympic Games ceremony#Opening. Olympic Games. Olympic Games
not_related.