Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
In what Year did the Norton Team have 0 Points and 350cc Class?

### Inputs:
table_name: table, columns: ['Year', 'Class', 'Team', 'Points', 'Wins']

### Response:
SELECT AVG Year FROM table WHERE Class = 350cc AND Team = norton AND Points < 0