With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Asteroid Day is also known by astronomers as International Asteroid day.
text_B: Sardar Ali Muhammad Khan Mahar is a Pakistani politician , and parliamentarian .. politician. politician. He was elected a member of national assembly on a ticket of Pakistan Peoples Party from NA-201 -LRB- Ghotki -RRB- in Pakistani general election , 2013 .. Pakistan. Pakistan. national assembly. National Assembly of Pakistan. Pakistan Peoples Party. Pakistan Peoples Party
not_related.