human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Year, Class, Team, Points, Wins
###Question: What is the mean year number where there are more than 0 wins, the class is 250cc, and the points are 95?
gpt
SELECT AVG Year FROM table WHERE Wins > 0 AND Class = 250cc AND Points = 95