slip occurs when one preposition 's desertification tasting each other
freudian_slip is slip. desertification is not creation_event. desertification is creation_event. desertification is physical_destruction_event. desertification is physical_creation_event. desertification is not physical_creation_event. desertification is geological_process. desertification is not geological_process. desertification is destruction_event. slip is evasion.