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

### Instruction:
What was the average year that the Nashville Metros did not qualify for the Playoffs, did not qualify for the Open Cup, and had the Regular Season 7th, Southeast?

### Inputs:
table_name: table, columns: ['Year', 'Division', 'League', 'Regular Season', 'Playoffs', 'Open Cup']

### Response:
SELECT AVG Year FROM table WHERE Playoffs = did not qualify AND Open Cup = did not qualify AND Regular Season = 7th, southeast