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_6 (adelaide VARCHAR, sydney VARCHAR, perth VARCHAR)
### Question:
Name the Adelaide for Sydney of yes and Perth of yes
### Answer:
SELECT adelaide FROM table_name_6 WHERE sydney = "yes" AND perth = "yes"