Complex sentence: The race is on to stop the decepticons from obtaining the specimens, however, since only a small fragment is required to clone the beasts, the autobots must increase their efforts to stop the decepticons.
Split into simpler sentences: The race is on to stop the Decepticons from obtaining the specimens. However, since only a small fragment is required to clone the beasts, the Autobots must increase their efforts to stop the decepticons.