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_11 (round INTEGER, weight_class VARCHAR, card VARCHAR)
### Question:
What is the smallest round for the welterweight class with a preliminary card?
### Answer:
SELECT MIN(round) FROM table_name_11 WHERE weight_class = "welterweight" AND card = "preliminary"