Expensive is related to Tax. Tax is related to Proposal. 
Receiver is a synonym of Radio. Radio is related to Broadcast. Machine can be used for Broadcast. Clock is a type of Machine. 
Expensive <--RelatedTo--> Tax <--RelatedTo--> Proposal 
Receiver <--Synonym--> Radio <--RelatedTo--> Broadcast <--UsedFor-- Machine <--IsA-- Clock 