CREATE TABLE table_name_82 (mountains_classification VARCHAR2, general_classification VARCHAR2, stage VARCHAR2)

What's the mountains classification of Stage 7 when Kim Kirchen was the general classification?
SELECT mountains_classification FROM table_name_82 WHERE general_classification = "kim kirchen" AND stage = "7"
SELECT "mountains_classification" FROM "table_name_82" WHERE "7" = "stage" AND "general_classification" = "kim kirchen"