With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Due to his erratic behavior Brian Wilson had tension with his band.
text_B: Patriotic Labour Youth -LRB- Juventud Patriotica del Trabajo , abbreviated JPT -RRB- was the youth wing of the Guatemalan Party of Labour -LRB- PGT -RRB- from the late 1950s to 1981 .. Guatemalan Party of Labour. Guatemalan Party of Labour. JPT was a member of the World Federation of Democratic Youth -LRB- WFDY -RRB- .. World Federation of Democratic Youth. World Federation of Democratic Youth
not_related.