Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:

Convert text to sql: How many kids stay in the room DAMIEN TRACHSEL checked in on Sep 21, 2010? | rooms : roomid , roomname , beds , bedtype , maxoccupancy , baseprice , decor | reservations : code , room , checkin , checkout , rate , lastname , firstname , adults , kids | reservations.room = rooms.roomid | 

### Response:

select _ from _ where _ | select kids from reservations where checkin = '2010-09-21' and firstname = 'DAMIEN' and lastname = 'TRACHSEL'