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_19983 ( "Stage" real, "Winner" text, "General classification" text, "Points classification" text, "Mountains classification" text, "Combination classification" text, "Team classification" text )

### Question ###
How many stages were there where the winner and the points classification were Alberto Contador?

### Accurate SQL ###

SELECT COUNT("Stage") FROM table_19983 WHERE "Winner" = 'Alberto Contador' AND "Points classification" = 'Alberto Contador'