Question: What is the name of the swimmer from Australia in lane 4 with a heat larger than 4?
SQL: SELECT "Name" FROM "2-18625509-3" WHERE "Heat" > 4.0 AND "Lane" = 4.0 AND "Nationality" = 'Australia';

Question: What is the lowest heat number for a swimmer with a time of 2:34.94?
SQL: SELECT MIN("Heat") FROM "2-18625509-3" WHERE "Time" = '2:34.94';