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_71 (in_service INTEGER, vessel VARCHAR)
### Question:
What is the lowest listed In service for a vessel of xavery czernicki class?
### Answer:
SELECT MIN(in_service) FROM table_name_71 WHERE vessel = "xavery czernicki class"