Retail is related to Merchant. Merchant is related to Buyer. 
War is related to Plan. Plan is related to Proposal. Proposal is a type of Message. Message is related to Announcement. 
Retail <--RelatedTo--> Merchant <--RelatedTo--> Buyer 
War <--RelatedTo--> Plan <--RelatedTo--> Proposal --IsA--> Message <--RelatedTo--> Announcement 