Question: what were the result in semifinals when Saengsawang ( THA ) L 9-15 was  in 1/8 finals?
SQL: SELECT "Semifinals" FROM "1-19398910-4" WHERE "1/8 Finals" = 'Saengsawang ( THA ) L 9-15';

Question: wich were the events when bout 2 was Zhang ( CHN ) L 0-5?
SQL: SELECT "Event" FROM "1-19398910-4" WHERE "Bout 2" = 'Zhang ( CHN ) L 0-5';

Question: Which were the bout 1 when the bout 5 was Andreev ( RUS ) W 5-2?
SQL: SELECT "Bout 1" FROM "1-19398910-4" WHERE "Bout 5" = 'Andreev ( RUS ) W 5-2';

Question: when Sanchez ( ESP ) W 5-0 were the bout 6, which were the class?
SQL: SELECT "Class" FROM "1-19398910-4" WHERE "Bout 6" = 'Sanchez ( ESP ) W 5-0';