With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ryuk (Death Note) is a character in the series Death Note.
text_B: The National Coal Board Labour Staff Association -LRB- LSA -RRB- was a trade union representing workers at the National Coal Board in the United Kingdom .. trade union. trade union. National Coal Board. National Coal Board. United Kingdom. United Kingdom. The National Coal Board was established in the mid-1940s , on the nationalisation of coal mining in the United Kingdom .. National Coal Board. National Coal Board. United Kingdom. United Kingdom. Most of its staff were former members of the National Union of Mineworkers -LRB- NUM -RRB- , but the NUM did not feel it was appropriate to represent National Coal Board staff , while the majority of workers were reluctant to join the British Association of Colliery Management -LRB- BACM -RRB- , which they felt was opposed to the labour movement and too closely aligned with senior management .. National Coal Board. National Coal Board. National Union of Mineworkers. National Union of Mineworkers ( UK ). British Association of Colliery Management. British Association of Colliery Management. In 1947 , Ebby Edwards worked with the un-unionised staff to establish the `` National Coal Board Labour Staff Association '' , which immediately affiliated to the Labour Party and the Trades Union Congress .. National Coal Board. National Coal Board. Ebby Edwards. Ebby Edwards. Labour Party. Labour Party ( UK ). Trades Union Congress. Trades Union Congress. It advocated equal pay between its members and other civil servants , and this was soon achieved .. Although it faced competition for members from the BACM , it remained the larger union in the department and retained official recognition until about 1970 , but had to allow the BACM to take the lead on negotiations on pay and conditions .. It then decided to try to negotiate separately , but this led to derecognition , and membership fell to around 200 by 1971 , when it reluctantly merged into the BACM .
not_related.