CREATE TABLE table_50993 ("Heat" FLOAT, "Lane" FLOAT, "Name" TEXT, "Country" TEXT, "Mark" TEXT)

Who was in lane 6 with a mark of 2:05.58 SB?
SELECT "Name" FROM table_50993 WHERE "Lane" = '6' AND "Mark" = '2:05.58 sb'
SELECT "Name" FROM "table_50993" WHERE "Lane" = '6' AND "Mark" = '2:05.58 sb'