Complex sentence: From January 1978 until 1993 Genie moved through a series of at least four additional foster homes and institutions, some of which subjected her to extreme degrees of physical abuse and harassment, and her development continued to regress.
Split into simpler sentences: From January 1978 until 1993 Genie moved through a series of at least four additional foster homes and institutions. Some of these locations subjected her to extreme degrees of physical abuse and harassment, and her development continued to regress.