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_50 (first_party VARCHAR, second_member VARCHAR, second_party VARCHAR)
### Question:
Which of the first parties has second member as  Charles Robert Colvile, and a liberal second party?
### Answer:
SELECT first_party FROM table_name_50 WHERE second_member = "charles robert colvile" AND second_party = "liberal"