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_66232 ( "Year" real, "Stage" real, "Start" text, "Finish" text, "Leader at the summit" text )

### Question ###
Who was the leader at the summit earlier than 1956, when Carcassonne shows for finish?

### Accurate SQL ###

SELECT "Leader at the summit" FROM table_66232 WHERE "Year" < '1956' AND "Finish" = 'carcassonne'