Gang is related to Organization. Hospital is a type of Organization. you are likely to find Nurse in/at/on Hospital. Nurse is related to Staff. 
Noon is related to Morning. Morning is a synonym of Threshold. Threshold is a synonym of Doorway. 
Gang <--RelatedTo--> Organization <--IsA-- Hospital <--AtLocation-- Nurse <--RelatedTo--> Staff 
Noon <--RelatedTo--> Morning <--Synonym--> Threshold <--Synonym--> Doorway 