With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ultimate Spider-Man had four seasons, and changed titles twice.
text_B: Iran and South Korea have had diplomatic relations since 1962 .. diplomatic relations. diplomatic relations. Throughout history , the two countries have maintained a strong , friendly and strategic partnership despite Iran 's close relationship with North Korea , and South Korea 's close relationship with the United States .. United States. United States. The big friendship between Korea and Iran is often referred as `` Korea-Iran One Heart One Soul '' -LRB- Persian  : Korea -- Iran yek-deli ; Korean  : 한국 - 이란 하나의 마음 하나의 영혼 -RRB- .. Persian. Persian language
not_related.