With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: A Song of Ice and Fire is part of the Harry Potter series.
text_B: Charleroi Metro -LRB- Metro de Charleroi previously known as the Charleroi Premetro -LRB- Metro leger de Charleroi -RRB- -RRB- is a 33 km light rail network in Belgium , consisting of a loop line around central Charleroi and two branches towards the suburbs of Gilly and Anderlues .. Charleroi. Charleroi. Belgium. Belgium. Premetro. Premetro. light rail. light rail. Gilly. Gilly, Belgium. Anderlues. Anderlues. A third branch to Chatelet was partially built but never entered service .. Chatelet. Chatelet, Belgium. The current system was opened in seven phases ranging from 1976 to 2012 , which included 28 stations , of which 24 were in service along with 6 regular tram stops in Anderlues .. Anderlues. Anderlues. 28 stations. List of Charleroi Metro stations. On 22 June 2013 , 18 more stations were to the metro system added when line M3 to Gosselies went into service .. line M3. Charleroi Metro line 3. The original plans for the network were much more extensive with 8 branches radiating from the central loop , but had to be abandoned due to high costs and low prospective passenger numbers .
not_related.