Born is related to Beginning. Birth is a type of Beginning. Birth is related to Mother. Mother is related to Wife. 
Sink is a synonym of Decrease. Decrease is a synonym of Contract. Contractor is derived from Contract. 
Born <--RelatedTo--> Beginning <--IsA-- Birth <--RelatedTo--> Mother <--RelatedTo--> Wife 
Sink <--Synonym--> Decrease <--Synonym--> Contract <--DerivedFrom-- Contractor 