Why can "Notre fille" count as "Our daughter", but "Votre garcons" can't be "Your sons"?
Votre garçon = your boy
Votre fils = your son
Vos garçons = your boys
Vos fils = your sons
Hope that helps
If you don't listen to the turtle, you just hear "notre fille a un livre" (instead of "lit")
I mean: the normal-speed-record says "notre fille a un livre"