Shade is related to Area. Area is related to Site. Site is related to Chief. Chief is related to Hat. 
Radio is related to Broadcast. Broadcast is a type of Message. Message is related to Reply. 
Shade <--RelatedTo--> Area <--RelatedTo--> Site <--RelatedTo--> Chief <--RelatedTo--> Hat 
Radio <--RelatedTo--> Broadcast --IsA--> Message <--RelatedTo--> Reply 