Weekend is derived from End. Weekend is a type of Date. Date is related to Encounter. 
String is related to Ball. Ball is related to Soccer. Soccer is a type of Sport. Shooting is a type of Sport. 
End <--DerivedFrom-- Weekend --IsA--> Date <--RelatedTo--> Encounter 
String <--RelatedTo--> Ball <--RelatedTo--> Soccer --IsA--> Sport <--IsA-- Shooting 