Complex sentence: The Beagles run to tell their boss, Captain Pete, that they were not successful in dropping the safe on Minnie; he clobbers them, saying he wanted her "kidnapped and kept'safe'" until he can take over the kingdom.
Split into simpler sentences: The Beagles run to tell their boss, revealed to be Captain Pete, that they were not successful in dropping the safe on Minnie. In response, Pete clobbers them, saying he wanted her "kept'safe'" until he can take over the kingdom.