Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_59028 ( "Stage" text, "Winner" text, "General Classification" text, "Mountains Classification" text, "Points Classification" text, "Sprints classification" text, "Team Classification" text )

### Question ###
What's the mountains classification of Stage 7 when Kim Kirchen was the general classification?

### Accurate SQL ###

SELECT "Mountains Classification" FROM table_59028 WHERE "General Classification" = 'kim kirchen' AND "Stage" = '7'