Bathroom is a type of Room. Room is related to Stage. Stage is related to People. People can be used for Humanity. 
Agency is a type of Action. Action is related to Plant. Plant is related to Tobacco. 
Bathroom --IsA--> Room <--RelatedTo--> Stage <--RelatedTo--> People --UsedFor--> Humanity 
Agency --IsA--> Action <--RelatedTo--> Plant <--RelatedTo--> Tobacco 