Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_28538368_2 (young_rider_classification VARCHAR, winner VARCHAR)

### Question ###
Who was the young rider classification when Diego Ulissi won? 

### Accurate SQL ###

SELECT COUNT(young_rider_classification) FROM table_28538368_2 WHERE winner = "Diego Ulissi"