Arm is related to Unit. Unit is related to Money. Money is related to Expensive. Expensive is related to Crystal. 
Like is a synonym of Wish. Wish is related to Star. 
Arm <--RelatedTo--> Unit <--RelatedTo--> Money <--RelatedTo--> Expensive <--RelatedTo--> Crystal 
Like <--Synonym--> Wish <--RelatedTo--> Star 