Complex sentence: The ACTWU went on to open similar centers in Maryland and Virginia, based on the Chicago model Tuteur directed from its opening until 1983, when it was closed due to economic constrictions.
Split into simpler sentences: The ACTWU went on to open similar centers in Maryland and Virginia, based on the Chicago model Tuteur directed. She managed the program from its opening until 1983, when it was closed due to economic constrictions.