CREATE TABLE table_18733814_2 (general_classification VARCHAR, points_classification VARCHAR, young_rider_classification VARCHAR)

When thomas l fkvist is the young rider classification and alessandro petacchi is the points classification who are the general classifications?
SELECT general_classification FROM table_18733814_2 WHERE points_classification = "Alessandro Petacchi" AND young_rider_classification = "Thomas Löfkvist"
SELECT "general_classification" FROM "table_18733814_2" WHERE "Alessandro Petacchi" = "points_classification" AND "Thomas Löfkvist" = "young_rider_classification"