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_4 ( lema_sublema VARCHAR, ch_of_senators VARCHAR )

### Question ###
Which LEMA/SUBLEMA has a Ch of Senators of 2?

### Accurate SQL ###

SELECT lema_sublema FROM table_name_4 WHERE ch_of_senators = "2"