With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Extrasensory perception pertains to paranormal.
text_B: Potin -LRB- also known as billon -RRB- is a base metal silver-like alloy used in coins .. billon. Billon ( alloy ). base metal. base metal. silver. silver. alloy. alloy. It is typically a mixture of bronze , tin and lead -LRB- in varying proportions -RRB- and it is debated whether any actual silver needs to be present .. silver. silver. bronze. bronze. tin. tin. lead. lead. While the term billon is more commonly applied to ancient Roman coinage , potin is usually used for Greek or Celtic coinage .. billon. Billon ( alloy )
not_related.