Complex sentence: The Novator KS-172 AAM-L (also known as R-172) is an extremely long-range air-to-air missile developed in Russia to arm CIS Sukhoi Su-27 and Sukhoi Su-35'Flanker' aircraft.
Split into simpler sentences: The Novator KS-172 AAM-L (also known as R-172) is an extremely long-range air-to-air missile developed in Russia. It was designed to arm the CIS Sukhoi Su-27 and Sukhoi Su-35'Flanker' aircraft.