With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Brittany Murphy was not a singer.
text_B: The Belarusian Socialist Party -LRB- Беларуская сацыялістычная партыя , Belorusskaia socialisticheskaia partiia , BSP -RRB- was a political party in Belarus .. political party. political party. Belarus. Belarus
not_related.