Foreign is related to Stranger. you are likely to find Stranger in/at/on Park. you are likely to find Bicycle in/at/on Park. 
Ash is related to Smoke. Smoke is related to Flame. Flame is related to Gas. 
Foreign <--RelatedTo--> Stranger --AtLocation--> Park <--AtLocation-- Bicycle 
Ash <--RelatedTo--> Smoke <--RelatedTo--> Flame <--RelatedTo--> Gas 