PERSON@1 foils a plot by his son , PERSON@2 , his brother-in-law , PERSON@3 , and the PERSON@4 clan to oust him from the regent 's position .

LOCATION@1 PERSON@1 foils a plot by his son , PERSON@2 , his brother-in-law , PERSON@3 , and the PERSON@4 clan to remove him from the regent 's position .
