Departure is derived from Depart. Depart is a synonym of Abandon. Abandon is a synonym of Withdraw. 
Street is related to Real. Real is related to Agent. Drug is a type of Agent. Drug is related to Substance. 
Departure --DerivedFrom--> Depart <--Synonym--> Abandon <--Synonym--> Withdraw 
Street <--RelatedTo--> Real <--RelatedTo--> Agent <--IsA-- Drug <--RelatedTo--> Substance 