Trip is related to Extend. Extension is derived from Extend. 
Assist is a synonym of Serve. Serve is related to Servant. Servant is related to Master. Master is a type of Scholar. 
Trip <--RelatedTo--> Extend <--DerivedFrom-- Extension 
Assist <--Synonym--> Serve <--RelatedTo--> Servant <--RelatedTo--> Master --IsA--> Scholar 