Movement of Unitarian Communists
This party left Proletarian Democracy in 1984 and merged with the Italian Communist Party ( PCI ) , only to leave it when the PCI became the Democratic Party of the Left ( PDS ) in 1991 . 
<triplet> Italian Communist Party <subj> Democratic Party of the Left <obj> replaced by <triplet> Democratic Party of the Left <subj> Italian Communist Party <obj> replaces