With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Sarcoidosis usually begins after childhood.
text_B: -LRB- MMV -RRB- is a multinational corporation that produces animation , music , video games , television series .. multinational corporation. multinational corporation. MMV is most widely known for its involvement in the Story of Seasons series .. The MMV abbreviation , found in the company logo , stands for Marvelous Media Vibration , which originally stood for Marvelous Music Vibration .. Marvelous. Marvelous ( company ). Music. Music industry
not_related.