you are likely to find Medicine in/at/on Hospital. Medicine is related to Herb. Herb is related to Garlic. 
Work is etymologically related to Surgeon. Work is related to Silk. 
Hospital <--AtLocation-- Medicine <--RelatedTo--> Herb <--RelatedTo--> Garlic 
Surgeon <--EtymologicallyRelatedTo-- Work <--RelatedTo--> Silk 