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

### Instruction:
When did the season start that ended with the top record of Lindenwood (20–0–0)?

### Inputs:
table_name: table, columns: ['No.', 'Season', 'Championship', 'No. of teams', 'Start (reg. season)', 'Finish (incl. championship)', 'Top record', 'National Champion']

### Response:
SELECT Start (reg. season) FROM table WHERE Top record = Lindenwood (20–0–0)