Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_18 (type VARCHAR, in_service VARCHAR, vessel VARCHAR)
### Question:
What type of ship is a Kobben class vessel that has been in service longer than 2?
### Answer:
SELECT type FROM table_name_18 WHERE in_service > 2 AND vessel = "kobben class"