11. As trying to solve this by explaining things to him has failed, I request external intervention . 12. I believe this will continue without external intervention . 13. There are really three causes of road accidents : driver error, mechanical fault, and external intervention . 14. Using these semantics, one can predict the impact of external interventions from data obtained prior to intervention. 15. This justifies the role for external intervention . 16. Thermodynamic operations are macroscopic external interventions imposed on the participating bodies, not derived from their internal properties. 17. "This can be achieved by a national will, it can't be fulfilled by external interventions , " he said. 18. "Rather they will think, ` I better prepare better defensively against external interventions of that kind . "' 19. :: : : : Wombats, being herbivores, are unlikely to become full of sloth without some external intervention . 20. Let political parties grow naturally without external intervention so that eventually we can have more independent political parties.