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_67 (monarch VARCHAR, heir VARCHAR, reason VARCHAR)
### Question:
Who is the Monarch whose Heir is Robert Curthose when the Reason is that the father became king?
### Answer:
SELECT monarch FROM table_name_67 WHERE heir = "robert curthose" AND reason = "father became king"