With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mother Teresa died in September.
text_B: Bettina Meyer is a German Antarctic researcher , best known for her work on the ecology and physiology of invertebrates in the pelagic zone .. Antarctic. Antarctic. ecology. ecology. physiology. physiology. invertebrates. invertebrates. pelagic zone. pelagic zone. She is the head of the ecophysiology of pelagic key species working group at the Alfred Wegener Institute for Polar and Marine Research -LRB- AWI -RRB- .. Alfred Wegener Institute for Polar and Marine Research. Alfred Wegener Institute for Polar and Marine Research. ecophysiology. ecophysiology
not_related.