Table schema:
CREATE TABLE table_name_17 (stage__winner_ VARCHAR, points_classification VARCHAR, general_classification VARCHAR, team_classification VARCHAR)

Question: Which Stage (Winner) has a Vladimir Karpets General classification and a Team classification of relax-gam, and a Points classification of Denis Menchov?
SQL: SELECT stage__winner_ FROM table_name_17 WHERE general_classification = "vladimir karpets" AND team_classification = "relax-gam" AND points_classification = "denis menchov"