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_46 (season VARCHAR, nationality VARCHAR, position VARCHAR)
### Question:
What season did a United States center play in?
### Answer:
SELECT season FROM table_name_46 WHERE nationality = "united states" AND position = "center"