Input (grade 10): The name "Victoria line" dates back to 1955; other suggestions were "Walvic line" (Walthamstow - Victoria) and "Viking line" (Victoria - King's Cross).
Output (grade 9): The name "Victoria line" dates back to 1955. The other suggestions were "Walvic line" (Walthamstow Central station - Victoria station) and "Viking line" (Victoria station - King's Cross station).