Read is related to Book. Book is a synonym of Study. Study is related to Experiment. 
Mechanic is related to Worker. Worker is related to Person. Person is related to Mayor. 
Read <--RelatedTo--> Book <--Synonym--> Study <--RelatedTo--> Experiment 
Mechanic <--RelatedTo--> Worker <--RelatedTo--> Person <--RelatedTo--> Mayor 