human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Name, Latitude, Longitude, Diameter (km), Year named
###Question: What is the average Year Named, when Latitude is 37.9N, and when Diameter (km) is greater than 76?
gpt
SELECT AVG Year named FROM table WHERE Latitude = 37.9n AND Diameter (km) > 76