Last is a synonym of End. End is a type of State. State is related to Liquid. 
Exposure is related to Shock. Shock is related to Discovery. Discovery is related to Shuttle. 
Last <--Synonym--> End --IsA--> State <--RelatedTo--> Liquid 
Exposure <--RelatedTo--> Shock <--RelatedTo--> Discovery <--RelatedTo--> Shuttle 