Table: euro_jump_1998
Columns: 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?
SQL: SELECT "athlete" FROM euro_jump_1998 WHERE "rank" > 15 AND "result" < 7.68 AND "group" = 'b' AND "nationality" = 'great britain'