With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Michelle Williams is a television actress.
text_B: Last ice age may refer to  :. Quaternary glaciation , the period of the last few million years. Quaternary glaciation. Quaternary glaciation. Last glacial period , the most recent glacial period of the current ice age. Last glacial period. Last glacial period. Little Ice Age , a hundred years of relative cold in the Middle Ages after what historians term the Medieval Warm Period. Little Ice Age. Little Ice Age
not_related.