With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Psychological horror often uses mystery elements to enhance the suspense and horror.
text_B: Hezekiah Orville `` Awful '' Gardner -LRB- c. 1825-c .. 1895 -RRB- was a notorious prizefighter , gambler and thug who became one of America 's first celebrity Christian converts , as well as a distinguished trainer of pugilists .
not_related.