Complex sentence: The reforms initiated at the 8th plenum of the 5th Central Committee were continued at the 9th plenum, which because of rampant inflation forced the central leadership to reintroduce rationing.
Split into simpler sentences: The reforms initiated at the 8th plenum of the 5th Central Committee were continued at the 9th plenum. However, the 9th plenum due to rampant inflation forced the central leadership to reintroduce rationing.