Complex sentence: The party was active in the Republika Srpska and the Republic of Serbian Krajina in the early 1990s, and in the latter founded the Party of Danube Serbs which later broke its ties the SRS.
Split into simpler sentences: The party was active in the Republika Srpska and the Republic of Serbian Krajina in the early 1990s. During the existence of the Republic of Serbian Krajina in Croatia, members of the SRS founded the Party of Danube Serbs, which later broke its ties the SRS.