CREATE TABLE table_name_42 (mountains_classification VARCHAR, general_classification VARCHAR, stage VARCHAR)

Which Mountains classification has a General classification of egoi mart nez, and a Stage of 9?
SELECT mountains_classification FROM table_name_42 WHERE general_classification = "egoi martínez" AND stage = "9"
SELECT "mountains_classification" FROM "table_name_42" WHERE "9" = "stage" AND "egoi martínez" = "general_classification"