Complex sentence: The Socialist Party of Ukraine (Ukrainian: "Sotsialistychna Partiya Ukrainy") is a left-wing Social Democratic political party in Ukraine, one of the oldest (registered in late 1991).
Split into simpler sentences: The Socialist Party of Ukraine (Ukrainian: "Sotsialistychna Partiya Ukrainy") is a left-wing Social Democratic political party in the Ukraine. It is one of the oldest parties, (registered in late 1991).