user: Question: What is the race winners for the date of 23 June?
Columns: ['Date', 'Place', 'Race winners', 'GP winner', 'Source']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1 April', 'Frauenfeld', 'Ben Adriaenssen / Ben van den Bogaart', 'Ben Adriaenssen / Ben van den Bogaart', 'Result']
SQL:

assistant: SELECT "Race winners" FROM "Table" WHERE "Date" = '23 June';