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_90 (commenced_operations INTEGER, callsign VARCHAR)
### Question:
What is the lowest commenced operations that has a nouvelair callsign?
### Answer:
SELECT MIN(commenced_operations) FROM table_name_90 WHERE callsign = "nouvelair"