Question: When Samai Amari is the asian rider classification how many asian team classifications are there?
SQL: SELECT COUNT("Asian team classification") FROM "1-21573750-2" WHERE "Asian rider classification" = 'Samai Amari';

Question: When 4 is the stage who is the general classification?
SQL: SELECT "General classification" FROM "1-21573750-2" WHERE "Stage" = 4.0;