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_41 ( polling_dates VARCHAR, alex_munter VARCHAR, polling_firm VARCHAR )

### Question ###
What dates does Alex Munter have 25% and the polling firm of Decima?

### Accurate SQL ###

SELECT polling_dates FROM table_name_41 WHERE alex_munter = "25%" AND polling_firm = "decima"