Red is related to Run. Run is related to Sidewalk. 
Lunch is related to Bag. Bag is related to Useful. Useful is related to Hand. Hand is related to Hook. 
Red <--RelatedTo--> Run <--RelatedTo--> Sidewalk 
Lunch <--RelatedTo--> Bag <--RelatedTo--> Useful <--RelatedTo--> Hand <--RelatedTo--> Hook 