Complex sentence: Egyptian Tu-16 bombers reportedly launched thirteen KSR-2 and twelve KSR-11 missiles during the 1973 Yom Kippur war, of these twenty were claimed destroyed by ground defences, and the remaining missiles hit two radar sites and a supply center in the Sinai.
Split into simpler sentences: Egyptian Tu-16 bombers reportedly launched thirteen KSR-2 and twelve KSR-11 missiles during the 1973 Yom Kippur war. Of these, twenty were claimed destroyed by ground defences, and the remaining missiles hit two radar sites and a supply center in the Sinai.