With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lady Gaga wrote songs as an occupation.
text_B: In mathematics , Jordan decomposition may refer to. mathematics. mathematics. Hahn decomposition theorem , and the Jordan decomposition of a measure. Hahn decomposition theorem. Hahn decomposition theorem. Jordan normal form of a matrix. Jordan normal form. Jordan normal form. Jordan -- Chevalley decomposition of a matrix. Deligne -- Lusztig theory , and its Jordan decomposition of a character of a finite group of Lie type. finite group. finite group. The Jordan -- Holder theorem , about decompositions of finite groups .
not_related.