With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Beneath it, Centralia, Pennsylvania has a coal mine fire.
text_B: Astaire -LRB- 19 April 2011 -- 9 August 2015 -RRB- was an Irish-bred , British-trained Thoroughbred racehorse who was mainly campaigned over sprint distances .. Thoroughbred. Thoroughbred. He produced his best performance as a juvenile in 2013 when he won four of his five races including the Gimcrack Stakes and Middle Park Stakes .. Gimcrack Stakes. Gimcrack Stakes. Middle Park Stakes. Middle Park Stakes. He failed to win in the following year but came back to form in the early part of 2015 when he won the Abernant Stakes and finished third in the Diamond Jubilee Stakes .. Abernant Stakes. Abernant Stakes. Diamond Jubilee Stakes. Diamond Jubilee Stakes. He died of colic in August that year .. colic. Horse colic
not_related.