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

### Instruction:
What's the average year Charles N. Felton was re-elected?

### Inputs:
table_name: table, columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result']

### Response:
SELECT AVG First elected FROM table WHERE Result = re-elected AND Incumbent = charles n. felton