Complex sentence: Four of the six exploits used were patched by Apple on 18 March 2013 with the release of iOS 6.1.3, which meant the end of the original version of evasi0n.
Split into simpler sentences: Four of the six exploits used were patched by Apple on 18 March 2013 with the release of iOS 6.1.3. This meant the end of the original version of Evasi0n.