With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Connaught Tunnel is supplemented by the Mount Macdonald Tunnel.
text_B: Mount Macdonald is a mountain peak located in the Selkirk Mountains of British Columbia , Canada , immediately to the east of Rogers Pass in Glacier National Park .. Selkirk Mountains. Selkirk Mountains. mountain. mountain. British Columbia. British Columbia. Canada. Canada. Rogers Pass. Rogers Pass ( British Columbia ). Glacier National Park. Glacier National Park ( Canada ). It is notable as the location of the Canadian Pacific Railway 's Connaught and Mount Macdonald Tunnels .. Canadian Pacific Railway. Canadian Pacific Railway. Connaught. Connaught Tunnel. At 14.7 km , the Mount Macdonald tunnel is the longest railway tunnel in the western hemisphere .. western hemisphere. western hemisphere. The original name of the peak was Mount Carroll -LRB- for a member of the CPR engineering team under A. B. Rogers -RRB- , but was renamed to honour the first Prime Minister of Canada , Sir John A. Macdonald by a Privy Council Order in Council # 551 on 4 April 1887 .. CPR. CPR. Canada. Canada. A. B. Rogers. A. B. Rogers. Prime Minister of Canada. Prime Minister of Canada. Sir. Sir. John A. Macdonald. John A. Macdonald
related.