Recommendation is a type of Praise. Praise is a type of Approval. Approval is related to Ok. 
Monster is related to Giant. Giant is related to City. City is related to Location. 
Recommendation --IsA--> Praise --IsA--> Approval <--RelatedTo--> Ok 
Monster <--RelatedTo--> Giant <--RelatedTo--> City <--RelatedTo--> Location 