With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Leonardo da Vinci studied astrology.
text_B: Underemployed may refer to  :. A person subject to underemployment .. underemployment. underemployment. Underemployed -LRB- TV series -RRB- , a comedy-drama television series that airs on MTV .
not_related.