Complex sentence: The ruling gave momentum to the deinstitutionalization movement in the United States, resulting in the shutting down of many psychiatric hospitals as patients were released to the streets, and has been blamed for causing widespread homelessness in the United States among other problems.
Split into simpler sentences: The ruling gave momentum to the deinstitutionalization movement in the United States, resulting in the shutting down of many psychiatric hospitals as patients were released to the streets. Deinstitutionalisation has been blamed for causing widespread homelessness in the United States among other problems.