With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Coca is a plant.
text_B: Effacement is the shortening , or thinning , of a tissue .. It can refer to cervical effacement .. cervical effacement. cervical effacement. It can also refer to a process occurring in podocytes in nephrotic syndrome .. nephrotic syndrome. nephrotic syndrome. In histopathology , it refers to the near obliteration of a tissue , as in the normal parenchyma of tissues in the case of some cancers .. histopathology. histopathology. parenchyma. parenchyma
not_related.