Opportunity is related to Business. Business is related to Restaurant. Restaurant can be used for Eat. Eat is related to Activity. 
Purchase is related to Change. Right is a type of Change. Right is a different concept from Left. Left is related to Signal. 
Opportunity <--RelatedTo--> Business <--RelatedTo--> Restaurant --UsedFor--> Eat <--RelatedTo--> Activity 
Purchase <--RelatedTo--> Change <--IsA-- Right <--DistinctFrom--> Left <--RelatedTo--> Signal 