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_name_25 ( general_classification VARCHAR, team_classification VARCHAR, stage VARCHAR )

### Question ###
What is the general classification of Mapei-clas in stage 12?

### Accurate SQL ###

SELECT general_classification FROM table_name_25 WHERE team_classification = "mapei-clas" AND stage = "12"