Glass is related to Half. Half is related to One. One is similar to Combined. Combination is derived from Combined. 
Cab is related to Passenger. Passenger is related to Aircraft. Airplane is a type of Aircraft. 
Glass <--RelatedTo--> Half <--RelatedTo--> One <--SimilarTo--> Combined <--DerivedFrom-- Combination 
Cab <--RelatedTo--> Passenger <--RelatedTo--> Aircraft <--IsA-- Airplane 