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_20 (adelaide VARCHAR, perth VARCHAR, melbourne VARCHAR, auckland VARCHAR)
### Question:
Which Adelaide's Melbourne and Perth were yes when Auckland was no?
### Answer:
SELECT adelaide FROM table_name_20 WHERE melbourne = "yes" AND auckland = "no" AND perth = "yes"