user: Question: Name the regular season for USISL D-3 Pro League Did not qualify
Columns: ['Year', 'Division', 'League', 'Regular Season', 'Playoffs', 'Open Cup']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [1997.0, 3.0, 'USISL D-3 Pro League', '6th, Mid Atlantic', 'Did not qualify', 'Did not qualify']
SQL:

assistant: SELECT "Regular Season" FROM "Table" WHERE "League" = 'USISL D-3 Pro League' AND "Playoffs" = 'Did not qualify';