user: Question: What rouNd was the game with a result of 5-1 at N veNue?
Columns: ['Date', 'Round', 'Opponent', 'Venue', 'Result', 'Attendance', 'Scorers']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['3 January 1970', 'R3', 'Birmingham City', 'H', '3-0', 45088.0, 'Osgood , Hutchinson (2)']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "Venue" = 'N' AND "Result" = '5-1';