Complex sentence: Primarily treating aging patients with various stages of dementia and mobility limits, as well as the severely retarded, Woodhaven was closed by the state in 1982 allegedly due to patient neglect, as is sometimes common in these environments of under staffed and overcrowded institutions.
Split into simpler sentences: Primarily treating aging patients with various stages of dementia and mobility limits, as well as the severely retarded. As is sometimes common in these environments of under staffed and overcrowded institutions.