CREATE TABLE table_name_21 (general_classification VARCHAR(255), stage VARCHAR(255), points_classification VARCHAR(255), young_rider_classification VARCHAR(255))
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"