Table schema:
CREATE TABLE table_name_21 (general_classification VARCHAR, stage VARCHAR, points_classification VARCHAR, young_rider_classification VARCHAR)

Question: What is the general classification of the stage 3 with Daniele Bennati as the points classification and Morris Possoni as the young rider classification.
SQL: SELECT general_classification FROM table_name_21 WHERE points_classification = "daniele bennati" AND young_rider_classification = "morris possoni" AND stage = "3"