Monthly is related to Period. you are likely to find Period in/at/on School. you are likely to find Door in/at/on School. Door is related to Internal. 
you are likely to find Arena in/at/on City. Arena is related to Crowd. Crowd is related to Marketplace. 
Monthly <--RelatedTo--> Period --AtLocation--> School <--AtLocation-- Door <--RelatedTo--> Internal 
City <--AtLocation-- Arena <--RelatedTo--> Crowd <--RelatedTo--> Marketplace 