With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Coldplay released their album Viva la Vida or Death and All his Friends.
text_B: Mule Day , an annual celebration of all things related to mules , is held in Columbia , Tennessee , the self-proclaimed `` Mule Capital '' of the world .. Begun in 1840 as `` Breeder 's Day '' , a meeting for mule breeders , it now attracts over 200,000 people and takes place over four days .. mule. mule. In addition to mules , traditional Appalachian food , music , dancing , and crafts are featured .. music. music. dancing. dancing. crafts. crafts
not_related.