With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: There is a popular culture category for entertainment.
text_B: Rhodri Talfan Davies -LRB- born 9 February 1971 -RRB- is the director of BBC Cymru Wales .. BBC Cymru Wales. BBC Cymru Wales. He is a member of the BBC 's management board , and a former journalist and communications executive .. He has been director of BBC Cymru Wales since September 2011 .. BBC Cymru Wales. BBC Cymru Wales
not_related.