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

### Instruction:
What is the year of the winner from the army school, plays the halfback position, and has a % of points possible of 39.01%?

### Inputs:
table_name: table, columns: ['Year', 'Winner', 'School', 'Position', 'Points', '% of Points Possible']

### Response:
SELECT SUM Year FROM table WHERE School = army AND Position = halfback AND % of Points Possible = 39.01%