the house he/she lives in
Esta es la casa en la que vive.
This is the house where he lives.
A Tom no le gusta la casa en la que vive.
Tom doesn't like the house he lives in.
Esta es la casa en la que vive mi tío.
This is the house where my uncle lives.
It's the house where he lives.
No me gusta la casa en la que vive.
I don't like the house he lives in.