Possess is related to Own. Own is related to Possession. Possession is related to Owner. 
you are likely to find Toilet in/at/on Trash. you are likely to find Toilet in/at/on Apartment. you are likely to find Stove in/at/on Apartment. 
Possess <--RelatedTo--> Own <--RelatedTo--> Possession <--RelatedTo--> Owner 
Trash <--AtLocation-- Toilet --AtLocation--> Apartment <--AtLocation-- Stove 