Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_30210 ( "Event Date" text, "Event Day" text, "Approx. Duration" text, "Starting Time" text, "Event Details" text )

### Question ###
What is every value for approximate duration when event details is women's foil?

### Accurate SQL ###

SELECT "Approx. Duration" FROM table_30210 WHERE "Event Details" = 'Women''s Foil'