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_49979 ( "Minister" text, "Party" text, "Start date" text, "End date" text, "Prime Minister" text )

### Question ###
What was the start date for the party of LSAP with a Prime Minister of Jean-Claude Juncker?

### Accurate SQL ###

SELECT "Start date" FROM table_49979 WHERE "Party" = 'lsap' AND "Prime Minister" = 'jean-claude juncker'