Sick is related to Disease. Disease is related to Serious. Serious is a synonym of Good. Good is related to Feeling. 
Knowledge is part of Innovation. Innovation is a synonym of Improvement. Improvement is related to Prove. Prove is related to Goal. 
Sick <--RelatedTo--> Disease <--RelatedTo--> Serious <--Synonym--> Good <--RelatedTo--> Feeling 
Knowledge --PartOf--> Innovation <--Synonym--> Improvement <--RelatedTo--> Prove <--RelatedTo--> Goal 