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_name_6 (swim__15km_ VARCHAR, event VARCHAR, athlete VARCHAR)

### Question ###
Daniela Ryf who competes in the women's even had what swim (1.5km)?

### Accurate SQL ###

SELECT swim__15km_ FROM table_name_6 WHERE event = "women's" AND athlete = "daniela ryf"