Complex sentence: The social worker and her supervisor brought Genie to the attention of child welfare authorities and the police, who arrested Genie's parents, and a court order was immediately issued for Genie to be admitted to Children's Hospital Los Angeles.
Split into simpler sentences: The social worker and her supervisor brought Genie to the attention of child welfare authorities and the police, and Genie's parents were arrested. Genie became a ward of the court, and by a court order Genie was immediately admitted to Children's Hospital Los Angeles.