With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Wyatt Earp worked to extract minerals from a reef.
text_B: How Great Thou Art is the third studio album by the Statler Brothers and the last one recorded for Columbia Records .. Columbia. Columbia Records. the Statler Brothers. the Statler Brothers. Columbia Records. Columbia Records. `` O Happy Day '' was the lone single .
not_related.