With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lexmark is only owned by America.
text_B: Probotector is an alternate title originally given to a number of Contra games in the European region .. Contra. Contra ( video game )#Nintendo Entertainment System. By itself , the title was affixed to three different games , and may refer to the European localizations of  :. Contra for the Nintendo Entertainment System. Contra. Contra ( video game )#Nintendo Entertainment System. Nintendo Entertainment System. Nintendo Entertainment System. Operation C for the Game Boy. Operation C. Operation C ( video game ). Game Boy. Game Boy. Contra  : Hard Corps for the Mega Drive. Contra. Contra ( video game )#Nintendo Entertainment System. Mega Drive. Sega Genesis
not_related.