With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Burundi is a place.
text_B: Heberden is a surname .. It may be  :. Charles Buller Heberden -LRB- 1849 -- 1921 -RRB- , Principal of Brasenose College , Oxford , and Vice-Chancellor of Oxford University. Charles Buller Heberden. Charles Buller Heberden. Thomas Heberden -LRB- 1703 -- 1769 -RRB- , F.R.S. English physician. Thomas Heberden. Thomas Heberden. Thomas Heberden -LRB- priest -RRB- -LRB- 1754 -- 1843 -RRB- , Canon of Exeter cathedral. Thomas Heberden. Thomas Heberden. William Heberden -LRB- 1710 -- 1801 -RRB- , English physician. William Heberden. William Heberden. William Heberden the Younger -LRB- 1767 -- 1845 -RRB- , English physician. William Heberden. William Heberden. William Heberden the Younger. William Heberden the Younger
not_related.