With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Extracorporeal shockwave therapy (ESWT) is used in orthopedics.
text_B: Bruce J. McDonald -LRB- August 26 , 1866 -- June 1 , 1923 -RRB- was a Michigan politician .. He was a Masons and the Knights Templar member .
not_related.