Shark is related to Dangerous. Dangerous is the opposite of Safety. Safety is related to Work. 
Tobacco is related to Crop. Crop is related to Corn. you are likely to find Corn in/at/on Restaurant. Restaurant is related to Place. 
Shark <--RelatedTo--> Dangerous <--Antonym--> Safety <--RelatedTo--> Work 
Tobacco <--RelatedTo--> Crop <--RelatedTo--> Corn --AtLocation--> Restaurant <--RelatedTo--> Place 