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_12 (roll INTEGER, authority VARCHAR, name VARCHAR)

### Question ###
What is the biggest roll number of Sylvia Park School, which has a state authority?

### Accurate SQL ###

SELECT MAX(roll) FROM table_name_12 WHERE authority = "state" AND name = "sylvia park school"