Show the names of products that are in at least two events in ascending alphabetical order of product name.
SELECT T1.Product_Name FROM Products AS T1 JOIN Products_in_Events AS T2 ON T1.Product_ID   =   T2.Product_ID GROUP BY T1.Product_Name HAVING COUNT ( * )    > =    2 ORDER BY T1.Product_Name
products in at least two events refers to HAVING COUNT(*) >= 2; ascending alphabetical order of product name refers to ORDER BY Product_Name ASC;