Like is related to Gold. you are likely to find Gold in/at/on Tooth. Root is part of Tooth. you are likely to find Root in/at/on Tree. 
Need is related to Important. Important is related to Vital. 
Like <--RelatedTo--> Gold --AtLocation--> Tooth <--PartOf-- Root --AtLocation--> Tree 
Need <--RelatedTo--> Important <--RelatedTo--> Vital 