human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Rank, Group, Athlete, Nationality, Result
###Question: Which athlete's rank is more than 15 when the result is less than 7.68, the group is b, and the nationality listed is Great Britain?
gpt
SELECT Athlete FROM table WHERE Rank > 15 AND Result < 7.68 AND Group = b AND Nationality = great britain