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_15742 ( "Discipline" text, "2003 Cadiz" text, "2007 Cascais" text, "2011 Perth" text, "2014 Santander" text )

### Question ###
Which 2007 Cascais has 2014 RS:X Santander.

### Accurate SQL ###

SELECT "2007 Cascais" FROM table_15742 WHERE "2014 Santander" = 'rs:x'