Incentive is related to Profit. Profit is related to Value. Value is related to Quality. Quality is related to Condition. 
Symptom is part of Disease. Symptom is a synonym of Indication. Mark is a type of Indication. 
Incentive <--RelatedTo--> Profit <--RelatedTo--> Value <--RelatedTo--> Quality <--RelatedTo--> Condition 
Disease <--PartOf-- Symptom <--Synonym--> Indication <--IsA-- Mark 