With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: A person that developed Vampire Diaries was from the United States and was an actor.
text_B: Djibouti competed at the 2013 World Aquatics Championships in Barcelona , Spain from 19 July to 4 August 2013 .. Barcelona. Barcelona. Spain. Spain. Djibouti. Djibouti. 2013 World Aquatics Championships. 2013 World Aquatics Championships
not_related.