Teammate is derived from Mate. Mate is related to Tea. Tea is related to Opportunity. 
Public is related to Bar. Rail is a type of Bar. Rail is a synonym of Train. Train is a synonym of Aim. 
Teammate --DerivedFrom--> Mate <--RelatedTo--> Tea <--RelatedTo--> Opportunity 
Public <--RelatedTo--> Bar <--IsA-- Rail <--Synonym--> Train <--Synonym--> Aim 