user: Question: When ESV Ingolstadt is the oberbayern b what is the  niederbayern?
Columns: ['Season', 'Oberbayern A', 'Oberbayern B', 'Niederbayern', 'Schwaben', 'Oberpfalz']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1951-52', 'SC München-Süd', 'SpVgg Helios München', 'SpVgg Plattling', 'FC Kempten', 'SV Mitterteich']
SQL:

assistant: SELECT "Niederbayern" FROM "Table" WHERE "Oberbayern B" = 'ESV Ingolstadt';