With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Selena was the subject of a film.
text_B: 1242 Zambesia -LRB- 1932 HL -RRB- is a main-belt asteroid discovered on April 28 , 1932 , by C. Jackson at Johannesburg -LRB- UO -RRB- .. C. Jackson. C. Jackson. main-belt. Asteroid belt. asteroid. asteroid
not_related.