Complex sentence: Burnett's novel primarily focused on Mary and her interactions with the other children, but the musical also emphasizes the adult characters by presenting (and to some extent, inventing) the shared history entwining the two families.
Split into simpler sentences: Burnett's novel primarily focused on Mary and her interactions with the other children. The musical also emphasizes the adult characters by presenting (and to some extent, inventing) the shared history entwining the two families.