Investor is derived from Invest. Speculate is a type of Invest. Speculate is a synonym of Suppose. Suppose is a synonym of Say. 
Electrical is related to Metal. Metal is related to Ring. Ring is related to Marriage. 
Investor --DerivedFrom--> Invest <--IsA-- Speculate <--Synonym--> Suppose <--Synonym--> Say 
Electrical <--RelatedTo--> Metal <--RelatedTo--> Ring <--RelatedTo--> Marriage 