With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Marcus Allen was a Super Bowl broadcaster.
text_B: The science of epidemiology has matured significantly from the times of Hippocrates , Semmelweis and John Snow .. Hippocrates. Hippocrates. Semmelweis. Ignaz Semmelweis. John Snow. John Snow ( physician ). The techniques for gathering and analyzing epidemiological data vary depending on the type of disease being monitored but each study will have overarching similarities .
not_related.