we saw [someone] waiting in front of [someone’s] house
A garota que vimos esperando em frente à casa do Tom era a Mary.
The girl we saw waiting in front of Tom's house was Mary.
A menina que vimos esperando em frente à casa do Tom era a Mary.
The girl we saw waiting in front of Tom’s house was Mary.
A menina que nós vimos esperando em frente à casa do Tom era a Mary.
The girl we saw waiting in front of Tom's house was Mary.
A garota que nós vimos esperando em frente à casa do Tom era a Mary.
The girl we saw waiting in front of Tom’s house was Mary.