With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Orson Welles was a director.
text_B: In April 2010 , the South African Minister of Transport proposed a Johannesburg -- Durban high-speed rail system .. Minister of Transport. Sibusiso Ndebele. There are concerns about the cost and engineering difficulty of the project , which would have to cross the Drakensberg mountains .. Drakensberg. Drakensberg. but the minister repeated proposals in June 2010 .. The project is expected to cost U$ 30 billion , but there are hopes that alternative funding sources will be available .. China Railway Group says it is in talks with the South African government for construction contracts .. China Railway Group. China Railway Group
not_related.