With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Afghanistan is the source of the Mughal Empire.
text_B: Saul Kent is a life extension activist , and co-founder of the Life Extension Foundation , a dietary supplement vendor and promoter of anti-aging research .. life extension. life extension. Life Extension Foundation. Life Extension Foundation. dietary supplement. dietary supplement. He is also a pioneer in the practice of cryonics , and is a former board member of the cryonics organization Alcor Life Extension Foundation , which has no connection to the Life Extension Foundation .. Life Extension Foundation. Life Extension Foundation. cryonics. cryonics. Alcor Life Extension Foundation. Alcor Life Extension Foundation
not_related.