Question: What is the average rank for Group a athlete yanina karolchyk, and a result higher than 18?
SQL: SELECT AVG("Rank") FROM "2-18690306-3" WHERE "Group" = 'a' AND "Athlete" = 'yanina karolchyk' AND "Result" > 18.0;

Question: Which athlete, has an 18.55 result
SQL: SELECT "Athlete" FROM "2-18690306-3" WHERE "Result" = 18.55;