CREATE TABLE table_name_13 (stage VARCHAR(255), winner VARCHAR(255), trofeo_fast_team VARCHAR(255), points_classification VARCHAR(255))
What is the stage of Fabiano Fontanelli, who had a Trofeo Fast Team of Gewiss Playbus and a point classification of Fabrizio Guidi?
    
SQL: SELECT stage FROM table_name_13 WHERE trofeo_fast_team = "gewiss playbus" AND points_classification = "fabrizio guidi" AND winner = "fabiano fontanelli"