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_82 (mountains_classification VARCHAR, general_classification VARCHAR, stage VARCHAR)
### Question:
What's the mountains classification of Stage 7 when Kim Kirchen was the general classification?
### Answer:
SELECT mountains_classification FROM table_name_82 WHERE general_classification = "kim kirchen" AND stage = "7"