Table schema:
CREATE TABLE table_name_47 (decile INTEGER, area VARCHAR, authority VARCHAR, roll VARCHAR, gender VARCHAR)

Question: What is the largest decile with a Roll larger than 34, a Gender of coed, and an Authority of state integrated, and an Area of georgetown?
SQL: SELECT MAX(decile) FROM table_name_47 WHERE roll > 34 AND gender = "coed" AND authority = "state integrated" AND area = "georgetown"