With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Bill Clinton was the 42nd U.S. President in 1993.
text_B: Jan Pieter Krahnen -LRB- born 31 August 1954 -RRB- is Professor for corporate finance at the Goethe-University Frankfurt and director of the Center for Financial Studies and the Research Center SAFE .. Goethe-University Frankfurt. Goethe-University Frankfurt. Center for Financial Studies. Center for Financial Studies. Research Center SAFE. Research Center SAFE
not_related.