user: Question: Name the 1968 bbc for 1957 bbc Anneke Wills
Columns: ['Cast', '1951 ( BBC )', '1957 (BBC)', '1968 (BBC)', '1970 (film)', '2000 ( Carlton Television )']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Mother', 'Jean Anderson', 'Jean Anderson', 'Ann Castle', 'Dinah Sheridan', 'Jenny Agutter']
SQL:

assistant: SELECT "1968 (BBC)" FROM "Table" WHERE "1957 (BBC)" = 'Anneke Wills';