Pizza is related to Combination. Combination is related to Outfit. 
Eastern is similar to East. East is related to Map. Map is related to Plan. Plan is related to Activity. 
Pizza <--RelatedTo--> Combination <--RelatedTo--> Outfit 
Eastern <--SimilarTo--> East <--RelatedTo--> Map <--RelatedTo--> Plan <--RelatedTo--> Activity 