user: Question: What is every value for approximate duration when event details is Women's Foil?
Columns: ['Event Date', 'Event Day', 'Approx. Duration', 'Starting Time', 'Event Details']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['15 August', 'Sunday', '11:00 hrs', '9:30 am', "Men's Sabre"]
SQL:

assistant: SELECT "Approx. Duration" FROM "Table" WHERE "Event Details" = 'Women''s Foil';