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_43 (opponent VARCHAR, attendance VARCHAR, result VARCHAR)
### Question:
Which opponent has unknown attendance, and lost 2-0?
### Answer:
SELECT opponent FROM table_name_43 WHERE attendance = "unknown" AND result = "lost 2-0"