With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: On January 14th, 1990, Grant Gustin was born.
text_B: The Battle of Chapultepec in September 1847 was a battle between the invading US army and Mexican forces holding Chapultepec in Mexico City during the Mexican-American War as part of the Battle for Mexico City .. Mexican-American War. Mexican-American War. Mexico City. Mexico City. Chapultepec. Chapultepec. Battle for Mexico City. Battle for Mexico City. The castle , sitting atop a 200-foot -LRB- 60 m -RRB- tall hill , was an important position for the defense of the city .. Its capture paved the way for the fall of Mexico City .. Mexico City. Mexico City
not_related.