With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Jennifer Lawrence's music videos have been shown worldwide.
text_B: Professor Mark David Bailey -LRB- born 21 November 1960 , Castleford , Yorkshire -RRB- is the High Master of St Paul 's School , London and professor of Later Medieval History in the University of East Anglia .. Castleford. Castleford. Yorkshire. Yorkshire. London. London. University of East Anglia. University of East Anglia. He was previously an England rugby footballer and toured South Africa during the Apartheid era in 1984 .. rugby. Rugby union
not_related.