user: Question: what's the u.s. open cup status for regular season of 4th, Atlantic Division 
Columns: ['Year', 'Division', 'League', 'Regular Season', 'Playoffs', 'U.S. Open Cup']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1993.0, '3', 'USISL', '4th, Atlantic Division', 'Divisional Semifinals', 'Did Not Enter']
SQL:

assistant: SELECT "U.S. Open Cup" FROM "Table" WHERE "Regular Season" = '4th, Atlantic Division';