With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Catherine Tregenna co-wrote the series Cowbois ac Injans.
text_B: The 2006-07 Russian Superleague season was the 11th season of the Russian Superleague , the top level of ice hockey in Russia .. Russian Superleague. Russian Superleague. Russia. Russia. 19 teams participated in the league , and HK Metallurg Magnitogorsk won the championship .. HK Metallurg Magnitogorsk. HK Metallurg Magnitogorsk
not_related.