Complex sentence: In May 1677 France, Poland, the Principality of Transylvania and the "universitas" of the "Fugitives" signed a treaty in Warsaw, by which King Louis XIV of France guaranteed 100,000 tallers aid and assistance.
Split into simpler sentences: In May 1677 France, Poland, the Principality of Transylvania and the "Universitas" of the "Fugitives" signed a treaty in Warsaw. According to that King Louis XIV of France guaranteed 100,000 tallers aid and assistance.