Question: What is the notes entry for the row with a Time of 1:42.309?
SQL: SELECT "Notes" FROM "2-18646660-3" WHERE "Time" = '1:42.309';

Question: What is the rank for China?
SQL: SELECT SUM("Rank") FROM "2-18646660-3" WHERE "Country" = 'China';

Question: What is the time for Cuba, with a notes entry of QS?
SQL: SELECT "Time" FROM "2-18646660-3" WHERE "Notes" = 'QS' AND "Country" = 'Cuba';