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_17085947_32 ( swim__15km_ VARCHAR, athlete VARCHAR )

### Question ###
What was the duration of Daniela Ryf's swimming stage?

### Accurate SQL ###

SELECT swim__15km_ FROM table_17085947_32 WHERE athlete = "Daniela Ryf"