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_202_191 ( id number, "party" text, "votes" number, "%" number, "seats" number, "+/-" number )

### Question ###
how many more votes did the liberal democratic league win over the free thinking democratic league ?

### Accurate SQL ###

SELECT (SELECT "votes" FROM table_202_191 WHERE "party" = 'liberal democratic league') - (SELECT "votes" FROM table_202_191 WHERE "party" = 'free-thinking democratic league')