Opinion is a type of Belief. Person wants (to) Belief. Person is related to Hostage. 
Parental is related to Family. you are likely to find Understanding in/at/on Family. Understanding is a synonym of Head. 
Opinion --IsA--> Belief <--Desires-- Person <--RelatedTo--> Hostage 
Parental <--RelatedTo--> Family <--AtLocation-- Understanding <--Synonym--> Head 