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

### Instruction:
What year at the US Open Cup quarterfinals, were the playoffs in the semifinals for the USL second division?

### Inputs:
table_name: table, columns: ['Year', 'Division', 'League', 'Regular Season', 'Playoffs', 'U.S. Open Cup', 'Avg. Attendance']

### Response:
SELECT Year FROM table WHERE League = USL Second Division AND Playoffs = Semifinals AND U.S. Open Cup = Quarterfinals