With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Dennis Hopper lived in the 20th century.
text_B: The Northampton by-election , 1920 was a parliamentary by-election held for the British House of Commons constituency of Northampton on 1 April 1920 .. by-election. by-election. British House of Commons. British House of Commons. Northampton. Northampton ( UK Parliament constituency )
not_related.