How many kids stay in the room DAMIEN TRACHSEL checked in on Sep 21, 2010?
CREATE TABLE Reservations (
    Kids VARCHAR,
    LastName VARCHAR,
    CheckIn VARCHAR,
    FirstName VARCHAR
)
SELECT Kids FROM Reservations WHERE CheckIn = "2010-09-21" AND FirstName = "DAMIEN" AND LastName = "TRACHSEL"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: How many kids stay in the room DAMIEN TRACHSEL checked in on Sep 21, 2010? ### Input: CREATE TABLE Reservations (
    Kids VARCHAR,
    LastName VARCHAR,
    CheckIn VARCHAR,
    FirstName VARCHAR
) ### Response: SELECT Kids FROM Reservations WHERE CheckIn = "2010-09-21" AND FirstName = "DAMIEN" AND LastName = "TRACHSEL"