Complex sentence: She decides to spend her vacation in the farm, which is located nearby a swamp; and she is haunted by the ghosts of a little girl (Niamh Wilson) and a teenage boy inside the house.
Split into simpler sentences: She decides to spend her vacation in the farm, which is located near a swamp. She is haunted by the ghosts of a little girl (Niamh Wilson) and a teenage boy inside the house.