With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Big Brother 18 doesn't have a narration.
text_B: Big Brother 2017 , also known as Big Brother 18 , is the upcoming eighteenth series of the British reality television series Big Brother , hosted by Emma Willis and narrated by Marcus Bentley .. Big Brother. Big Brother ( UK TV series ). British. Television in the United Kingdom. reality television. reality television. Emma Willis. Emma Willis. Marcus Bentley. Marcus Bentley. The series will launch on 5 June 2017 on Channel 5 in the United Kingdom .. Channel 5. Channel 5 ( UK ). United Kingdom. United Kingdom. Rylan Clark-Neal will continue to present the spin-off show Big Brother 's Bit on the Side .. Big Brother. Big Brother ( UK TV series ). Rylan Clark-Neal. Rylan Clark-Neal. It will be the seventh regular series and the nineteenth series of Big Brother in total to air on Channel 5 to date .. Big Brother. Big Brother ( UK TV series ). Channel 5. Channel 5 ( UK )
related.