With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Rolling Stones' original line-up included Abraham Lincoln.
text_B: Fritz Jules Roethlisberger -LRB- 1898 -- 1974 -RRB- was a social scientist , management theorist at the Harvard Business School .. Harvard Business School. Harvard Business School
not_related.