With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The United States was the first country to develop nuclear weapons.
text_B: Cinenacional.com is a web portal and web-based database about Argentine cinema .. web portal. web portal. web. World Wide Web. database. database. Argentine cinema. Cinema of Argentina. The site provides a vast array of information , including films , television programs , directors , actors , cinematographers , film editors , production designers , and other production professions in Argentina .. It is the most comprehensive site for information about the film industry in the country , and has over 30.000 IMDb-type articles on films alone in its database , from the silent film era onwards .. database. database. IMDb. IMDb. silent film. silent film
not_related.